New Audi A6 Avant - In Depth

Press Release

Page 1 - Design
Page 2 - Engines and transmissions
Page 3 - Engines and transmissions (cont.)
Page 4 - The chassis
Page 5 - The chassis (cont.)
Page 6 - The body
Page 7 - Comfort and communication electronics
Page 8 - Comfort and communication electronics (cont.)
Page 9 - Standard equipment
Page 10 - Optional equipment

The Design

Dynamism and elegance

Audi is adding a new chapter to the success story of the Avant: the new Audi A6 Avant represents a unique blend of design and dynamism, driving pleasure and functionality. With countless innovations, a high standard of comfort and luxurious equipment, the Audi A6 Avant is poised to extend the lead it already enjoys in its sector.

Powerful TDI and petrol engines with up to eight cylinders and 246 kW (335 bhp) maximum output are the source of the new A6 Avant's supremacy. Front-wheel or quattro permanent four-wheel drive ensure that the engine's power is always translated reliably into traction. Power which, thanks to the advanced suspension design and very rigid bodyshell, opens up new horizons in driving dynamics.

The first Audi A6 Avant models will reach their new owners in March 2005.

The exterior

Here is a car that features notable design unity: measuring 4.93 metres in length, 1.86 metres in width, and 1.46 metres in height, the new Audi A6 Avant visibly sets a new standard. Its styling combines the clear architecture that is so typical of Audi with other core elements of the brand's progressive design.

The already classic proportions of the Avant's silhouette, with its high shoulder line, narrow window area and flat, sloping tail end, have been infused with a new degree of tension: the rising dynamic line gives the basic proportions of the A6 Avant that added forward urge. The optical centre of gravity of the vehicle body is clearly forward of the rear axle, thus giving the tail end a lighter appearance. The seamlessly integrated, gently curved roof rails emphasise the car's coupe-like silhouette.

The horizontal design of the rearward structure, with the two-section rear lights curving well in towards the centre, gives the vehicle an air of sturdiness and stability. These basic proportions and the design of the lights clearly indicate the blood ties with two other recent additions to Audi's range of five-door models: the A4 Avant and the A3 Sportback.

A glance at the front end, with the trapezoidal-shaped single-frame grille, identifies the A6 Avant as a representative of the latest generation of Audi models. The most advanced lighting technology is visible behind the clear-glass lenses: as an option, the new A6 Avant is available with dynamic adaptive light technology incorporating high-intensity xenon plus units and daytime running lights.

The distinctly domed centre of the engine hood in turn symbolises the power of the engines driving the new Audi A6 Avant.

The interior

Moving inside the new A6 Avant, it is also obvious at first glance that this is a brand-new model generation. The high, wide centre console, for example, with controls and switches within perfect reach, emphasises the sporty interior architecture that integrates the driver as the central player.

Sportiness, clarity and ergonomic perfection are the characteristic features of the new cockpit design. A joint cover connects the instrument cluster and the upper part of the centre console, which is angled slightly towards the driver, to form one common unit.

The instrument cluster: the round coolant temperature and fuel gauges are located inside the newly designed, teardrop-shaped surrounds, next to the two large rev counter and speedometer dials.

The A6 Avant likewise features the latest generation of Audi steering wheels. As a characteristic feature of the three and four-spoke steering wheels, the single-frame trapezoid with the four Audi rings is cited on the central airbag cap. Its exterior geometry likewise picks up on the shape of the single-frame grille.

Versatile and sophisticated: the luggage compartment

Your luggage always travels Business Class in the new Audi A6 Avant. Inside, this is emphasised both by the materials and finish of the luggage compartment and by its entirely new securing concept. Countless meticulously thought-out details set the benchmark for this class thanks to their versatility and variability.

All new A6 Avant versions have two securing rails recessed into the floor of the level, 1.05 metre wide load area (through-loading width). These are fitted with a total of four sliding, adjustable and lockable lashing eyes which can be used to secure items of luggage of practically any size to suit individual needs. All A6 Avant versions have bag hooks integrated into the luggage compartment trim, as well as an additional luggage net to one side. A lockable side compartment can be supplied as an optional extra, for keeping objects hidden from prying eyes. An integrated 12-volt power socket is standard.

The load floor can be folded up as a standard feature and can be locked in a variety of positions to divide up the load area. This not only provides scope for stowing objects between the rear seat backrest and the raised floor to prevent them from sliding around, but also provides access to the lower load area, into which a large plastic tray is integrated.

Where can you put your muddy walking boots after a mountain hike or your wet snowboard boots at the end of a hard day on the slopes? This easy-to-clean tray provides a simple solution.

The rail system's variability can be further enhanced as an optional extra: a telescopic bar can be engaged into both rails to divide up the luggage compartment diagonally or horizontally, thus providing another means of reliably securing items of luggage. Additional support is provided by a retaining strap, which - when both ends are engaged in a rail - lashes objects down securely against the sides of the luggage compartment at the push of a button, or divides up the compartment transversely when engaged in both rails, to keep large, bulky items of luggage in place.

The cycle rack system, which has been developed specially for the A6 Avant and is likewise mounted on the rails and around the protective tray, is a means of transporting two mountain bikes securely.

Audi's development engineers have further optimised the securing method for the safety partition net, which protects passengers against displaced items of luggage in the event of emergency braking manoeuvres or a rear-end crash. It is now much easier to fold the rear seat backrest down one third, two thirds or entirely, as desired.

The large storage box for the luggage compartment is a particularly versatile item. Secured to the rails by means of the lashing eyes, it can be fitted in two different positions: with its opening facing to the rear, it can be used for storing smaller items of luggage and for dividing up the luggage compartment. When pushed up flush against the rear seat with its opening facing forwards, the box can be accessed via the load-through facility in the rear seat and is thus transformed into a storage compartment that is well away from inquisitive eyes.

The improved reversible mat (option) has exclusive velour in the interior colour on one side; when turned over, its rubberised, easy-to-clean surface protects the load area floor. The reversible mat now also incorporates a fold-out section that can be pulled down over the bumper. This protects the bumper during loading and unloading, or provides a clean surface for sitting down on, when changing your footwear after a hike for example.

The load-through facility in the rear seat back with removable ski and snowboard bag is another new feature that will be of particular interest to winter sports enthusiasts. Winter sports equipment can be packed away swiftly and easily in the bag outside the car, then stowed in the luggage compartment, avoiding snow or meltwater drips.

For the first time on an Audi, the tailgate opens and closes automatically at the push of a button. The opening process can also be initiated by pressing the button on the car key. The required opening angle - in other words, by how much the tailgate opens - is infinitely programmable.

A quick press of the remote control for the central locking or of the button in the tailgate is all it takes to stop it in the required position. And if the button is kept pressed for six seconds, the opening angle is stored in the memory for future use.

Engines and transmissions

The Audi A6 Avant will initially be available with a choice of no fewer than six engines installed longitudinally – three petrol and three TDI power units. All these engines share a level of power and torque that is outstanding in this segment of the market:

• 4.2 V8 developing 246 kW (335 bhp), 420 Newton-metres
• 3.2 V6 FSI developing 188 kW (255 bhp), 330 Newton-metres
• 2.4 V6 developing 130 kW (177 bhp), 230 Newton-metres
• 3.0 V6 TDI developing 165 kW (225 bhp), 450 Newton-metres
• 2.7 V6 TDI developing 132 kW (180 bhp), 380 Newton-metres
• 2.0 TDI developing 103 kW (140 bhp), 320 Newton-metres (mid-2005)

All engines comply with the limits of the EU4 emission standard.

The six and eight-cylinder power units come from Audi's new V-engine family. Their highlights in design and construction are the 90° cylinder angle and a distance of 90 millimetres between the cylinders, compact dimensions, maintenance-free camshaft drive via a chain and low-friction roller-arm valve drive.

The petrol engines

4.2 V8 The powerful 4.2 V8 with chain drive made an outstanding debut in the Audi S4 at the end of 2002. Now it has been retuned for the Audi A6 and A6 Avant, offering powerful torque up to nominal engine speed plus an agile response and superior fuel economy all in one – these are the characteristics of this new engine.

This engine is notable not only for its assertive output of 246 kW (335 bhp) at 6,600 rpm and a peak torque of 420 Nm at 3,500 rpm. The resulting road performance is also impressive, even in this demanding sector.

The new A6 4.2 quattro accelerates from a standstill to 100 km/h in a mere 6.2 seconds, continuing smoothly all the way to the car's electronically limited top speed of 250 km/h. Its overall fuel consumption is just 11.7 litres of Super Plus per 100 kilometres.

The unbeatably short design of this engine is also impressive, especially in view of the fact that its compact dimensions enable it to fit in the engine compartment without the front end having to be increased in size, as was the case on the previous model.

To make this compactness possible, the Audi engine developers have installed a chain drive for camshafts and ancillaries on the engine output side. This made it possible to reduce the length by no less than 52 millimetres compared with the previous unit which had the same displacement.

An additional advantage is that, weighing a mere 195 kg, the entire V8 power unit is extremely light. On the road, this means significant benefits in terms of both balance and driving dynamics.

The V8 power unit breathes through a two-stage variable intake manifold made of magnesium. The length of the ram pipe in the torque position is 705 mm, reducing to a length of just 322 mm in the power position. Engine management is the task of the advanced Bosch Motronic ME 7.1.1. This system provides the option of activating the starter electronically, thus enabling the driver to start the engine keylessly, simply by pressing a button (advanced key).

Exhaust emissions are cleaned by two multi-stage catalytic converters which are positioned close to the engine so that they heat up quickly. Thanks to the efficiency of this system, the new Audi A6 4.2 easily outperforms the EU4 emission limits, even with the standard features of quattro drive and tiptronic transmission. 3.2 V6 FSI The 3.2 V6 FSI, which made its debut in the A6 saloon, boasts all the features of an ultramodern petrol engine: FSI petrol direct injection with demand-controlled fuel supply, four valves per cylinder, a variable intake manifold and continuous camshaft adjustment on both the intake and exhaust sides.

This V6 engine delivers its maximum output of 188 kW (255 bhp) at 6,500 rpm; its peak torque of 330 Nm is available at just 3,250 rpm. The A6 3.2 FSI with 6-speed manual gearbox and front-wheel drive accelerates to 100 km/h in 7.1 seconds, while its top speed is electronically limited to 250 km/h (this also applies to the version with quattro permanent four-wheel drive and 6-speed tiptronic transmission).

More than 90 percent of the engine's maximum torque is available across a wide speed range from 2,400 to 5,500 rpm – a unique characteristic for a naturally aspirated V6. As far as the driver is concerned this means a dynamic and forceful response to every movement of the accelerator pedal plus a broad usable speed range up to 7,200 rpm, hefty torque and excellent fuel efficiency: an average consumption of 9.9 litres of Super grade fuel per 100 km is the best evidence of this engine’s efficiency and the special abilities of FSI technology.

FSI engines develop more power and dynamism than conventional units with indirect manifold injection – and they do so with a very high standard of fuel economy. Boosting efficiency in this way, Audi is adding a new dimension to the operating efficiency of standard petrol engines, once again demonstrating the "Vorsprung durch Technik" that is so typical of the brand.

In June 2001, FSI direct petrol injection system confirmed its unique potential in what must be the most challenging endurance test in the world: a power unit with FSI direct injection drove the Audi R8 to victory in the Le Mans 24 Hours.

So how does FSI technology differ from a conventional engine? The term "petrol direct injection" makes the central feature clear: in contrast to indirect injection where fuel is injected into the inlet manifold, the fuel is injected directly into the combustion chamber.

A common rail high-pressure injection system with a newly developed, demand-controlled single-piston high-pressure pump ensures exactly the right supply of fuel, delivering precisely the volume required for building up operating pressure to between 30 and 100 bar.

In the intake tract, also comprising the two-stage variable intake manifold, moving charge movement flaps swirl the induced air around as necessary. Together with the optimum geometry of the combustion chambers and the supremely accurate metering of injected fuel down to the last millisecond, this allows a significant increase in compression: while conventional production engines generally have a compression ratio of not more than 10.5:1, the compression ratio of the Audi 3.2 FSI power unit is 12.5:1 – a record for production cars and the essential prerequisite for the new engine's high standard of efficiency.

New base engine

New in its design, the 3.2-litre V6 has been developed with the specific goal of maximum space efficiency: measuring only 360 mm in length and 430 mm in width, and weighing a mere 169.5 kg thanks to the use of aluminium, the engine offers significant benefits in terms of driving dynamics.

As on Audi’s other new V-configuration engines in general, the cylinders are arranged at an angle of 90o and the distance between cylinders is 90 millimetres. Cylinder bore of 84.5 mm and cylinder lift of 92.8 mm add up to an overall engine capacity of 3,123 cc.

The four-valve cylinder head with a side opening for the injection valve is another special feature designed specifically for this 3.2-litre power unit. Both the inlet and exhaust camshafts come with variable adjustment to ensure optimum results, in terms of both maximum output and an extremely broad peak-torque range. The camshafts, oil pump and balancing shaft are all driven by four-piece chain drive of the same type as in the 4.2-litre eight-cylinder unit.

Emissions control in the 3.2 FSI is optimised by two ceramic catalytic converters positioned close to the engine. As a result, this high-performance power unit easily undercuts the EU4 emissions standard.

Fine-tuning of the exhaust system offers the driver yet another bonus: the distinctly sporty but never intrusive sound of a genuine six-cylinder unit, making the qualities of the engine a truly sensory experience.

The Audi A6 Avant 3.2 FSI with front-wheel drive is available with a manual 6-speed gearbox or multitronic. The permanent quattro four-wheel-drive model comes with a choice of either a manual 6-speed gearbox or 6-speed tiptronic, whatever the customer prefers. 2.4 V6 Another premiere for the new generation of the A6 Avant: the 2.4 V6 is the smaller version of the 3.2-litre power unit with a smaller displacement and featuring intake manifold fuel injection. In all, the two engines differ through just 33 components – apart from the combustion process as such, these include the intake tract and the two-stage variable intake manifold.

Considering this close resemblance, it is no surprise that the smaller of the two six-cylinder units has all the basic virtues of the 3.2 FSI: sports character combined with exemplary smoothness and refinement, plus a high degree of all-round efficiency.

As on the 3.2-litre version, the engine's silky-smooth, vibration-free running results not least from the balance shaft module which is able to eliminate oscillations extremely efficiently.

The cylinder stroke of 77.4 mm and the bore of 81 mm combine to provide an overall engine displacement of 2393 cc. From this capacity the new V6 engine delivers a maximum output of 130 kW (177 bhp) at 6,000 rpm and a maximum torque of 230 Nm between 3,000 and 5,000 rpm.

This is an excellent basis for an extremely sporty performance: this version of the A6 Avant accelerates to 100 km/h in 9.2 seconds and on to a top speed of 226 km/h. The combined-cycle fuel consumption is 9.9 litres of Super fuel per 100 kilometres. And in common with all other A6 engines, its emissions are below the limits of the EU4 standard.

The front-wheel-drive Audi A6 Avant 2.4 will be available at launch with either a 6-speed manual gearbox or with the continuously variable multitronic transmission. The A6 Avant 2.4 is also offered as a quattro model with 6-speed manual gearbox.

The TDI engines

3.0 TDI A genuine power pack is being introduced in the Audi A6 Avant in the guise of the three-litre six-cylinder unit. Compared with the competition, this engine offers truly impressive power and torque potential: 225 bhp and 450 Nm. Maximum torque is available just above idle speed, starting at a mere 1,400 rpm and giving the driver forceful acceleration at all speeds.

Despite having a torque-converter transmission, this means performance on the road that even many a sports car will find hard to match: the A6 Avant 3.0 TDI accelerates from 0 to 100 km/h in just 7.3 seconds, and reaches a top speed of 240 km/h.

Further fortes are the engine's highly efficient noise management and compliance with the strict EU4 emissions standard.

Featuring turbocharger technology and map-controlled, cooled exhaust-gas recirculation, this V6 four-valve power unit is the first six-cylinder TDI in Audi's new family of V-configuration engines. Both the camshafts and the oil pump, incidentally, are driven by chains.

Like all engines in Audi's new V-generation, the V6 TDI has extremely compact dimensions: engine length, for example, measures a mere 444 mm. This is also an important step in view of achieving an overall engine weight of just 219 kg, making the 3.0 TDI one of the lightest V6 diesels in the world. This benefits the power-to-weight ratio and the weight distribution in equal measure – two characteristics that are of central importance for the driving dynamics of the new A6 Avant 3.0 TDI quattro.

Common rail technology with piezo inline injectors

Mixture preparation is the task of a latest generation common rail system featuring a high-pressure pump and a rail for each row of cylinders. This increases maximum injection pressure to 1,600 bar, 250 bar more than with previous common rail systems.

This high injection pressure results in even finer atomisation of the fuel and therefore in better mixture preparation and more efficient combustion.

The piezo injectors are undoubtedly the most important innovation of the new common rail system. The injection process makes use of the piezo effect: a voltage is applied to ceramic which changes its crystal structures. The result is a minimal geometric change which – supported by a hydraulic element – mechanically triggers the opening of the injector needle.

The piezo injectors offer multiple advantages compared with conventional solenoid valves. The moving mass at the injector needle is for instance reduced by no less than 75 percent, from 16 to 4 grams in each case. This enables considerably smaller and more precisely metered injection quantities. At the same time, piezo technology allows a higher injector needle speed.

The number of injection processes per combustion cycle can thus be varied almost at will. Audi’s TDI development engineers opted for up to five injection processes for the 3.0 V6: in addition to the main injection process, double pilot injection takes place at the lower end of the speed range and single pilot injection in the medium speed range. On top of this, single post-injection takes place up to around 2,500 rpm and at maximum part-load.

This strategy produces both lower emissions and a smoother combustion process, the benefits of which are most immediately apparent in the engine's acoustic behaviour. The 3.0 TDI engine is not only much quieter and smoother than its predecessor, it now unquestionably serves as the benchmark in its class.

Turbocharger with two intercoolers

For optimum charging of the combustion chamber in all operating conditions, the six-cylinder 3.0 TDI has a turbocharger accommodated inside the engine's "vee" to make optimum use of the available space. And to enhance efficiency to the highest level, the temperature of the intake air is reduced by two intercoolers running in parallel, any loss of pressure being kept to a minimum.

The exhaust gas is purified by a close-coupled primary catalytic converter – located close to the turbocharger – and the main converter under the floor. As a result of all these measures, the A6 Avant 3.0 TDI is the first car in the diesel executive class that easily undercuts the limit values of the EU4 standard.

One feature of the new engine that is undoubtedly as welcome as its efficiency at reducing emissions is its impressive fuel economy. Its overall consumption over 100 kilometres is just 8.0 litres of diesel. In practice this obviously means a very significant cruising range, the A6 Avant 3.0 TDI quattro being able to cover almost 1,000 kilometres on one tank of fuel.

The Audi A6 Avant 3.0 TDI comes as standard with quattro permanent four-wheel drive and either a 6-speed manual gearbox or a 6-speed automatic transmission complete with tiptronic function.

The 2.7 V6 TDI

In addition to the 3.0 TDI, the A6 Avant is starting out with a further representative of the latest V6 TDI engine generation with common rail system and piezo inline injectors: the 2.7 TDI.

Like its big brother, which has a capacity of three litres, it makes use of the latest injection technology and consequently already undercuts the demanding EU4 emission limits, which will not take effect until 2006, even without a diesel particulate filter.

A new crankshaft with the stroke reduced by 8.3 millimetres, new connecting rods and different pistons result in an overall swept volume of 2,698 cc. The key data with regard to its performance are an output of 132 kW (180 bhp) across an engine speed range of 3,300 to 4,250 rpm and a peak torque of 380 Nm available from just 1,400 rpm all the way up to 3,300 rpm.

These measures result not only in high performance and an enormous torque plateau, but also in low fuel consumption (7.0 litres per 100 kilometres), extremely low emissions and outstanding acoustics. It is especially in this latter area that the new engine undoubtedly represents the new benchmark in this class.

As a result the driver will notice a spontaneous response and tremendous pulling power even from the lowest revs. The 100 km/h mark is passed after just 8.3 seconds on the way up to a top speed of 225 km/h. But it is the mid-range sprints that are the outstanding discipline of this new high-performance engine, which is supplied in combination with front-wheel drive and 6-speed manual gearbox.

2.0 TDI

Driving pleasure and supreme economy, refinement and environmental compatibility: the 2.0 TDI four-cylinder with pump-injector technology, one of the most modern engines in its class, is making its debut in an executive class Avant as a highly talented all-rounder.

Again, the particular strengths of this engine are its high output and powerful torque, combined with equally impressive economy. The Audi A6 Avant 2.0 TDI is easily able to cover more than 1,100 kilometres on one single tank of diesel.

A maximum output of 103 kW (140 bhp) and peak torque of 320 Nm, available between 1,750 and 2,500 rpm, make this the most powerful and dynamic four-cylinder diesel that Audi has even installed in its cars. Performance on the road is correspondingly impressive: the 2.0 TDI with 6-speed manual gearbox accelerates to 100 km/h in just 10.6 seconds and continues on up rapidly to its top speed of 205 km/h.

Two other key strengths of the 2.0 TDI are its low fuel consumption – 6.1 litres of diesel fuel per 100 km (overall value) – as well as compliance with the EU4 emissions standard.

In addition, the four-cylinder unit gives the new Audi A6 Avant a standard of smoothness and refinement which certainly befits an executive estate of this calibre. A balance shaft module with two shafts rotating in opposite directions helps to reduce engine vibrations extremely effectively.

The front-wheel-drive Audi A6 Avant 2.0 TDI will be available with a 6-speed manual gearbox or multitronic from mid-2005.

Transmissions

The low fuel consumption and excellent dynamic performance offered by the new Audi A6 Avant benefit from the standard usage of 6-speed manual and 6-speed automatic transmissions.

Six gears featured as standard

The manual versions of the new Audi A6 Avant – as well as the saloon version – come with Audi's latest generation of ML transmissions, the abbreviation ML standing for Manual/Longitudinal.

This gearbox is noted for its extremely precise, crisp, short gearshifts. Thanks to a special mount for the selector forks, the gear lever is effectively protected against driveline vibrations; the driver does not feel the gear lever trembling at all.

Internal friction reduced by a series of measures increases the efficiency of the manual gearbox. This means that engine power can be converted even more efficiently into forward propulsion.

The 6-speed tiptronic

A six-speed tiptronic transmission is available for the very high-torque 4.2 V8, 3.2 FSI and 3.0 TDI power units in conjunction with quattro permanent four-wheel drive. Having already made its debut in the high-performance Audi S4 sports model, this transmission converts the engines’ power potential into a superior symbiosis of dynamism and operating convenience.

Weight reduction, rapid gearshifts and an optimised shifting strategy make sure that the convenience of the automatic transmission is combined with the sports performance so typical of the A6.

Compared with its five-speed predecessor, the new six-speed gearbox is 14 kilograms lighter; its overall weight is a mere 115 kilograms.

Again compared with a five-speed automatic transmission, the spread of gear ratios is up by 18 percent on average. This means a much improved accelerating performance in the low gears and a clear reduction in engine speed and consequently a reduction in both noise level and fuel consumption at high speeds.

The shifting speed of the new 6-speed tiptronic has also been significantly optimised. The driver benefits from more spontaneous gear changes particularly when downshifting. In addition, the fact that the engine automatically double-declutches further increases agility.

Both in stage D and in the S sport program, the electronics respond efficiently to parameters such as lateral and longitudinal acceleration as well as to the movement of the accelerator pedal. This helps to prevent any unwanted upshifts when cornering.

Continuously variable multitronic

After making its production debut successfully in the A6 2.8 in the year 2000, Audi's continuously variable multitronic automatic transmission now also offers its superior qualities in the new A6 Avant, combining the benefits of a manual gearbox with those of a multi-stage automatic transmission. Fortes typical of multitronic are smooth but very dynamic acceleration as well as convenient operation and the efficient transmission of power.

The high standard of operating convenience offered by multitronic exceeds that of a conventional converter-type automatic transmission, while in terms of dynamic performance and economy, multitronic can by all means be compared with a manual gearbox. And if drivers wish to choose the appropriate transmission ratio themselves, they can do so by means of paddles on the steering wheel – now providing no fewer than seven predefined speeds.

Numerous reinforcements and adjustments, as well as optimised cooling, serve to significantly enhance the performance of Audi's continuously variable automatic transmission. The multitronic can now transmit torques as high as 330 Nm.

Modified for the new Audi A6 Avant, the multitronic variator spans an even wider range of gear ratios: the overall spread between the highest and the lowest gears is now 6.25, virtually ideal for such a transmission. This on the one hand permits dynamic, sports-style acceleration using the largest possible ratio, while on the other hand the engine's fuel-saving potential is fully exploited using the smallest ratio.

A further special feature is the ability of the electronics to emulate the functions of a manual gearbox. For the latest multitronic version, Audi has opted for no fewer than seven forward gears which the driver can activate using the one-touch function in the second shift plane or by pressing the shift paddles on the steering wheel (optional).

These seven gearshift stages are memorised by the system as fixed shift programs. Depending on which gear the driver selects, the controller is supplied with the ratio as a set point, which it establishes and maintains. Even these manually prompted gearshifts take place smoothly and jolt-free, satisfying the desire for sports performance thanks to continuous adaptation.

A new multitronic function in the Audi A6 Avant is the starting assist function: a simple press of the brake pedal and the service brake automatically prevents the car from rolling back on a gradient. It is also released automatically as soon as the driver opens the throttle to pull away again.

quattro permanent four-wheel drive

quattro permanent four-wheel drive – a drive principle that has been enjoying success in both motorsport and production vehicles alike for the last 25 years – is a typical feature of all high-performance Audi models. More than 1.8 million Audi quattro models had come off the production line by the beginning of 2005 alone – a figure that speaks for itself.

quattro ensures excellent traction and stable cornering, and minimises the effect of propulsive forces on the car's self-steering properties. This is a precondition for high cornering speeds and a high level of dynamic stability.

A Torsen differential in the new Audi A6 Avant – with its longitudinally installed engines – automatically ensures the optimum distribution of power between all four wheels. The name "Torsen" is a contraction of the two terms "torque" and "sensing". The Torsen differential is a self-locking worm gear.

The advantage of this is that the locking action is only prompted by the driveline. Yet this type of differential accommodates differences in speed when the brakes are applied and when cornering. Normally the power is split 50:50 between the two pairs of wheels, but in extreme cases 75 percent of propulsive power can be diverted to either pair.

Audi dynamic suspension

The Audi dynamic suspension in the new A6 Avant uses a technology which has already proven its sporting qualities under the most demanding and challenging conditions: the enhanced, Audi-typical four-link front suspension layout in combination with the self-tracking trapezoidal-link rear suspension adopted from the Audi A8 and Audi A6 saloon – a combination featured both on the front-wheel-drive and quattro versions. The main components are made of lightweight aluminium which makes a decisive contribution towards reducing unsprung masses.

Not only has wheelbase been increased significantly (by 83 millimetres) compared with the previous model, the car’s track at the front is also up by 72 to 1,612 millimetres and has been increased at the rear by 49 to 1,618 millimetres – dimensions which set a new benchmark in this class. Weight distribution between the front and rear axles has also been optimised.

On the road this means dynamic driving behaviour of the highest calibre. Clearly, features of this kind again place the new A6 Avant on the same level as the A8 which was so lavishly praised by the motoring press. Like the latter, the A6 Avant is the sportiest car in its class. This is also due in no small measure to the speed-dependent servotronic power steering featured as standard, supplementing the precise handling of the new A6 Avant with an even more sensitive steering response.

The front suspension

In relation to the passenger cell, the four-link front suspension of the new A6 Avant has been moved forward by 83 millimetres compared with the previous model, thus ensuring a far better axle load distribution with corresponding advantages in terms of driving dynamics. This change in proportions also looks good, making the front overhang far shorter and thus giving the entire car a much more compact appearance.

Weight-optimised components help to reduce unsprung masses: four aluminium wishbones of optimised design guide the wheel; the axle subframe is of sheet-metal construction, the upper bearing block is made of cast aluminium. The tubular anti-roll bar has also been constructed in accordance with the principle of lightweight design.

The entire kinematics and elastokinematics have also been redefined, for maximum dynamic behaviour and comfort. Lateral rigidity in particular has benefited from the precise further development of all link bearings. Larger rubber mountings on the subframe insulate the cabin from road impacts.

The steering

The new Audi A6 Avant comes as standard with hydraulic rack-and-pinion steering featuring speed-dependent power assistance, Audi servotronic. The development goal here was to provide the highest conceivable standard of sporty steering precision and improved steering comfort.

The refined servotronic system enables the driver to manoeuvre into parking spaces with a minimum of steering effort and maximum accuracy, as well as providing a clear response from the road at higher speeds. The system also offers a high level of sensitivity around the straight-ahead position and even more comfortable initial response behaviour.

The steering kinematics have been optimised in such a way that despite the longer wheelbase and driven front wheels, the car’s turning circle is no larger than that of comparable saloon cars with rear-wheel drive. The steering ratio is even more direct on the sporty 4.2 model.

The steering wheel of the new Audi A6 Avant is adjustable by 40 millimetres in a vertical direction and axially by 50 millimetres. Intensive detail work in the area of the steering column and the point at which it is connected to the body makes sure that vibrations at the steering wheel are suppressed almost entirely and are practically no longer noticed by the driver.

The launch of the new A6 Avant generation also hails the advent of the latest generation of steering wheels. The skeleton of the steering wheel, which is not visible to the driver, is made of diecast magnesium, a material combining very low weight with very high rigidity.

The three and four-spoke steering wheels are recognisable at first glance from the airbag cover which echoes the same characteristic trapezoidal shape as the single-frame grille.

Depending on the customer's personal taste, the steering wheel rim is available either in wood or covered in leather (standard). All versions of the steering wheel can be ordered as an option with multifunction buttons and steering-wheel mounted tiptronic shift paddles. The four-spoke multifunction steering wheel can also be ordered optionally with a heated rim which can be activated at a button on the steering wheel spoke.

The rear suspension

An outstanding technical achievement that already benefits drivers of the Audi A8 and the latest generation of the A6 saloon is now also being introduced for the new Avant: self-tracking trapezoidal-link rear suspension fitted on both quattro and front-wheel-drive versions of this car. Hence, all new Audi A6 Avant models come as standard with one of the most complex and efficient rear wheel suspension concepts currently available.

The trapezoidal-link rear suspension makes for top-quality ride comfort on all models, coupled with dynamic behaviour that will amaze the driver of many a competing model.

The trapezoidal link is a hollow shell structure made from high-strength sheet steel. This torsionally and flexurally rigid link absorbs a large portion of the forces acting on the wheel. Together with the track rod located behind it, it thus determines the elastokinematic behaviour of the axle. The track rod is a lightweight sheet steel structure.

All wheel control elements pivot on the resiliently mounted subframe via rubber-metal mounts which isolate axle vibrations very effectively. Four large, hydraulically damping mounts help to insulate the body against vibrations.

The linear, high-strength steel springs rest on both the body structure and the trapezoidal links. The twin-tube gas-filled shock absorber is connected to the wheel carrier, so that a direct-ratio effect is obtained. This ensures a particularly sensitive response from the shock absorber.

Spring travel on the new Audi A6 Avant has been increased compared with the previous model, above all in the interests of ride comfort. Directional stability on bumpy roads, however, also benefits significantly from this improvement.

In terms of kinematics, the trapezoidal-link rear suspension has been developed with the focus on its sporting characteristics, one of the key development goals of the new Audi A6 Avant. The precise reduction of bump toe-in as a function of spring travel improves the car's directional stability, steering precision, and handling. The entire construction is conceived to provide neutral, moderately understeering driving behaviour all the way up to a high handling limit.

Available as an option: adaptive air suspension

As on the Audi A8 before it, the new A6 Avant together with the A6 saloon can be ordered with adaptive air suspension as an optional extra. This sophisticated system ensures an even more refined synthesis of decidedly sporty handling characteristics and supreme suspension comfort. The integrated self-levelling function makes sure that the Avant always maintains the same ride height, regardless of load and driving style.

Even when stationary, the body of the A6 Avant with air suspension is 13 millimetres lower to the ground, thus enhancing its sporty appearance. In addition, the air suspension allows the speed-dependent lowering of the body – this change in ride height means a low centre of gravity and significantly increased directional stability as a result. At motorway speeds the lowering of the body also optimises the car’s aerodynamic properties and thus reduces fuel consumption.

At low speeds the adaptive air suspension establishes greater ground clearance if the driver so wishes. This is an additional bonus on uneven terrain.

A choice of three different characteristics ranging from very sporty to comfortable can be selected via the central Multi Media Interface (MMI) control element.

The automatic mode represents the perfect all-round setting. At speeds of more than 120 km/h, the body is lowered by 15 millimetres. The change in ride height first of all means a lower centre of gravity. At motorway speeds, the lower settings in addition reduce drag and therefore fuel consumption. If the driver slows down to less than 70 km/h, the air suspension raises the vehicle body again to its starting position.

Gentle compression and excellent long-distance comfort are the characteristics of the "comfort" setting. If the "comfort" mode has been selected, speed-dependent lowering of the body at motorway speeds is suppressed.

The performance in the "dynamic" setting is a match for steel-spring sports suspension. In the "dynamic" mode, the car's ride height is lowered permanently by 15 millimetres.

At low speeds the adaptive air suspension establishes greater ground clearance of 15 millimetres in the lift mode if the driver so wishes. This is an additional bonus on uneven terrain. At road speeds of more than 100 km/h, the vehicle is then automatically lowered to its standard height.

In all selectable ranges, the continuously variable dampers are in addition automatically adapted to the type of road and driving style. The classic conflict between sportiness and comfort is thus overcome.

The technology

The new A6 Avant has adaptive air suspension air spring struts on the front wheels, with the air-suspension bellows arranged concentrically around the infinitely adjustable shock absorbers. The air-suspension bellows consist of a special, multi-layered elastomer material with polyamide axial threads to increase strength. The advantage of this design is that the thin-walled and consequently soft-rolling gaiters lend the new A6 Avant excellent rolling properties and make the suspension highly responsive to minor jolts.

On the rear axle, the air springs and controlled shock absorbers are separated from one another. The advantage of this configuration, as with conventional suspension, is that it allows a large through-loading width and thus helps to keep the floor in the luggage compartment low.

Thanks to its concept, air suspension provides a number of inherent advantages: the occupants benefit from a pleasant, smooth ride at all times, regardless of the load the vehicle is carrying. This is because extra air is pumped into the springs at high gross weights, and discharged again when the load is removed. The firmness of the springs thus adapts to the load situation at all times.

Brake system

The brake system is also matched to the power potential of the new A6 Avant models. Even the entry-level engine version comes with 16-inch brakes, the particularly powerful 4.2-litre eight-cylinder version features a 17-inch brake system. The front brake discs measure 314 millimetres in diameter on the A6 2.4 and 2.0 TDI and 321 millimetres on the 3.2 FSI and 3.0 TDI (A6 4.2 quattro: 347 mm). The rear brake discs have a diameter of 302 mm (A6 4.2 quattro: 330 mm).

Benefiting from these large dimensions, disc temperatures under high brake loads are reduced by more than 100o C, improving performance reserves still further.

The system is operated via a tandem brake servo. In conjunction with a piston diameter of 27 mm in the master brake cylinder, this gives the driver a sporty, firm feel at the brake pedal together with excellent controllability.

Safety as standard: new ESP generation

All new Audi A6 Avant models come with the latest-generation electronic stabilisation program, ESP 8, developed by Bosch. This system comprises ABS brakes with electronic brake-force distribution EBD and hydraulic brake assist which automatically increases brake power in panic-braking situations. Together with the yawing moment controller, the traction control system ASR and the electronic differential lock EDL provide the foundation for enhanced ESP safety.

At the same time, ESP 8 incorporates outstanding new or optimised functions.

The emergency braking function alerts vehicles behind to potential hazards by activating the hazard warning lights when the brakes are applied hard.

Understeering control has been further optimised: when the vehicle understeers, the system no longer brakes just the two wheels on the inside of the bend; the brakes are applied to individual or even to all four wheels simultaneously, depending on the situation.

Improved safety for vehicle combinations

Large cars like the A6 and A6 Avant are frequently used to tow trailers, such as horse boxes or boat trailers, for examples. Another new function is indispensable to safety in such situations: it is often the case that when travelling at cruising speed, even in straight line, the trailer starts to move slightly from side to side which can consequently build up into a dangerous swaying motion. The trailer stabilisation system uses the ESP sensors to detect any swinging of the trailer – caused, for example, by a sudden evasive manoeuvre by the driver or a crosswind. By applying the brakes automatically and reducing torque, the system decelerates the trailer, thus helping to stabilise it.

The new ESP has been advanced to an even higher standard in terms of both electronics and hydraulics. New pressure control ensures even more precise intervention of the ESP stabilising functions in accordance with the given situation, particularly when the car is understeering.

The brake disc cleaning function integrated in ESP is another new feature. This helps to keep the brake discs largely dry on wet roads, even if the driver has not braked for a long time. To achieve this, the brake pads are pressed against the discs under low hydraulic pressure at regular intervals, ensuring even more spontaneous brake response even in wet conditions.

For the first time the new Audi A6 Avant is fitted with a two-stage ESP deactivation button: pressing the button briefly deactivates the traction control system ASR only. This is sometimes necessary in order to be able to pull away in deep snow or on gravel roads. If the button is pressed a bit longer, on the other hand, the driver is able to deactivate ESP in all operating conditions. This is necessary on the race track, for example, to enable an intentional sideways slide through the use of the brakes. Even then, however, the EDL and ABS functions remain operative.

Electromechanical parking brake

Following its successful debut in the Audi A8, the electromechanical parking brake is now also being introduced in the new A6 Avant, offering significant functional advantages over and above all the usual functions of a conventional handbrake.

The system, operated via a pull/push control on the centre console, automatically ensures the necessary parking brake application force. The operating concept is deliberately based on what most drivers would consider the usual operating principle for conventional systems: a quick pull of the switch applies the brake; if the driver pushes it down – while the brake pedal is depressed – the system is released.

The parking brake’s status is indicated by tell-tale lights in the control element and in the instrument cluster.

The system is designed for gradients of up to 30 percent. If this is exceeded, the driver is warned by a text message (“vehicle too steep�).

Moreover, by way of an integral starting assist function, the electromechanical parking brake makes it easier to pull away without jolts or rolling backwards on inclines, without the driver needing to release the brake by hand. The system calculates the ideal moment for releasing the parking brake, on the basis of data such as the transmission position selected, the accelerator pedal position, engine speed and the angle of inclination. On cars with a manual gearbox, the system also takes the position of the clutch pedal into account. As soon as there is sufficient torque to move the vehicle forwards, the electronics automatically release the parking brake.

It goes without saying that the electromechanical parking brake also has the emergency braking function stipulated by law: above a speed of 8 km/h the driver can stop the vehicle simply by pulling on the switch – if the brake pedal locks, for example. Within barely more than a second, this builds up a deceleration force of 8 m/s2, far more than with a conventional handbrake.

Wheels and tyres

Even the four-cylinder and six-cylinder versions (up to 130 kW) of the new Audi A6 Avant come as standard with 7x16-inch alloy wheels shod with 205/60 R16 tyres. The particularly powerful six-cylinder models ride on 7.5x16-inch wheels with 225/55 tyres, the 4.2-litre eight-cylinder model is fitted as standard with 17-inch wheels on 225/50 tyres.

As an option, the new Audi A6 Avant is available with a choice of ten different versions of wheel up to 18 inches in diameter and running on tyres up to 245/45 R18. In winter, A6 drivers have the choice of three wheels up to 7x17 inches in size and fitted with 225/50 tyres.

All new Audi A6 Avant models come as standard with the Audi tyre mobility system, but may also be supplied with a spare wheel as an option.

A permanent tyre pressure monitoring system is also available as an option for the new Audi A6 Avant. The system monitors the tyre pressure and temperature of each individual wheel.

In the event of a loss of pressure, it informs the driver optically and acoustically via the display in the instrument cluster, indicating the wheel involved. To provide this function, the signals from the wheel's electronic control unit are transmitted wirelessly to the central vehicle electronics.

There are two warning stages: a pressure loss of more than 0.3 bar at a wheel activates a yellow warning lamp. This tells drivers to check their tyre pressure and top up the air to the correct level at the next opportunity. If tyre pressure is more than 0.5 bar below the limit required or if the tyre is losing pressure quickly, a red lamp lights up urging drivers to stop immediately and remedy the problem.

The system is also able to take into account minor changes in temperature and pressure caused, for instance, by intense sunshine, hot air coming from the engine or unusual weight distribution of the car, thus avoiding any false alarms.

As an option: PAX wheels

From 2005, the new Audi A6 Avant will also be available with cast aluminium wheels with run-flat tyres – the so-called PAX system. These wheels and tyres allow drivers to continue for up to 200 kilometres at a top speed of 80 km/h, even if a tyre has suffered a complete loss of pressure.

Thanks to the run-flat properties of the PAX wheel, drivers can, in the event of a puncture, reach an Audi workshop of their choice instead of having to change the wheel themselves or call a breakdown recovery service – a new dimension to mobility that befits the executive segment.

The flat tyre still offers a high level of residual ride comfort – driver do not perceive a loss of pressure as a permanent deterioration of running characteristics. However, to make drivers aware of the threat of a flat tyre or a gradual loss of pressure, the PAX system is only offered in combination with the automatic tyre pressure monitoring system.

This means that drivers are kept informed of the condition of all wheels and are in addition reminded of the maximum permitted speed of 80 km/h if one of the tyres suffers a puncture.

The PAX system consists of a special wheel rim, a modified tyre design and the actual run-flat element, a support ring that sits almost in the middle of the rim and encloses it. This technology ensures the tyre's run-flat qualities even if there is a complete loss of pressure.

The body

Torsional rigidity boosted by 25 percent: this increase clearly demonstrates the qualities of the new Audi A6 Avant, especially considering that the previous model was already widely acclaimed for its extremely robust body.

Qualities of this kind offer significant advantages in terms of both vibration comfort and driving dynamics. Vibration amplitudes reduced to a minimum are a clear indication of the high standard of strength achieved. These are in turn one of the key physical factors behind the interior's excellent acoustics.

A further crucial factor taken into account during development of the body structure was to maintain the highest possible level of passive safety, in other words to protect the occupants effectively in a collision. At the same time it is important to avoid any increase in weight, since this would also mean an increase in fuel consumption and emissions. The only way to meet these conflicting interests is to use the most advanced materials and joining technologies.

Lightweight design and solidity

The use of high-strength and ultra-high-strength sheet steel makes it possible to reinforce specifically those structural components that are absolutely crucial for ensuring a high level of stability. Lightweight aluminium components such as panels and extruded profiles, on the other hand, help to save a considerable amount of weight.

Sheet aluminium, for example, is the ideal material for the engine hood and front mudguards – as on the previous A6. Aluminium can also be used, however, on large components subject to only moderate loads, such as the lower section of the rigid rear bulkhead or the front panel of the radiator tank.

Used in the form of an extra-strong extruded profile, aluminium can also be used for reinforcement purposes, for example on the side sills, where it stiffens the cell structure for extra safety in a side-on or offset collision.

The front roof frame is a hybrid structure, made from a combination of steel and plastic. This blend of materials combines the positive properties of both materials, providing a lightweight structure with a high degree of solidity.

Tailored blanks or tailored rolled blanks – rolled plates varying in wall thickness – are used at points subject to particularly high loads, such as the suspension strut cross-member or the front longitudinal members.

The various components are connected to each other using a number of different techniques: apart from conventional spot welding, rivets, spot welding combined with bonding, laser welding and soldering as well as MIG welding help to produce a lasting, solid connection. This makes it possible to fulfil a wide range of requirements in every area.

Passive safety

One of Audi's fundamental objectives in developing every model is to make the passenger cell very stiff. After all, this is the basic structure serving as the foundation for all of the car's restraint systems and their protective effect.

One of the most important aspects to consider when designing this cell is behaviour in a frontal impact, by far the most common type of impact in accident statistics. To put it in simple terms, the body development engineers have two main tasks in the area of safety technology: first, to convert kinetic energy into deformation energy absorbed by body components. Second, to ensure that such energy does not even reach the occupants protected within the passenger cell, which must be made as robust as possible.

In a frontal crash, intelligent up-front sensors behind the radiator grille interact with other sensors and control units, registering within just a few thousandths of a second that the car has been involved in an impact. The belt tensioners are then ignited just a few milliseconds later in order to minimise any possible belt slack.

Once the loads acting on the belts have reached a certain limit, a belt force limiter feeds out additional belt length, allowing the occupants to "fall" into the airbag once it has inflated. The full-size front airbags are activated in two stages: in the first stage – activated in accidents at low speeds – forces acting on the occupants are kept at a low level. At higher speeds, the second stage is triggered in order to utilise the full safety potential of the front airbags.

The particular position chosen for numerous elements such as the air conditioning, control units, the ignition lock and key is also an integral part of the car's safety concept. All hard components and surfaces have been moved away from critical impact areas which might harm the occupants; other areas such as the footwells are cushioned by extensive padding. This significantly reduces the risk of injury for the car's occupants.

The safety steering column comes with a double telescoping function, in other words it is – like the pedals – disconnected from any intrusions into the front end of the car. A force limiter at the steering column mounting additionally ensures that the steering column will give along a defined path in response to impact with the driver's chest, causing the steering wheel to move down to prevent injury.

In a frontal crash at low speeds of up to 15 km/h, the highly efficient bumper system serves to minimise energy right from the start, avoiding the need for expensive repairs to the welded body structure behind.

Thanks to the precise deformation of the bumper, even the mudguards remain unharmed in a head-on collision at 15 km/h. Clearly, these are features that insurance companies will welcome and duly reward with a particularly favourable insurance premium.

Safety, too, in a side impact

While at the front end of the car there is ample deformation length, the deformation travel available at the side for absorbing energy is at a minimum. Only a particularly high standard of strength in this area can protect the occupants: this is precisely why the new Audi A6 Avant has a highly stable structure made primarily from dual-phase steel which stands out for its inherent rigidity and the protection it provides against excessive loads and forces.

In the side sill, an extruded aluminium profile ensures effective absorption of energy. Within the doors, tailored blank inner panels, together with reinforcements at shoulder and sill level and an aluminium impact beam, offer substantial resistance to deformation. Several beams arranged perpendicular to the direction of travel likewise serve to stabilise the passenger cell; two high-strength steel pipes also installed laterally in the front seats help to maintain survival space for the occupants.

High-strength reinforcements also extend far into the roof area, serving to protect the occupants in a rollover.

In a collision from the side, the occupants are protected by side airbags fitted as standard at the front (optionally available at the rear) and the head airbag system known as sideguard. The latter covers almost the entire side window area, offering occupants of all sizes a high degree of safety. With the airbags being rapidly filled by a hybrid gas generator and maintaining their pressure for a long period, passenger safety is ensured quickly and lastingly, which means that sufficient safety potential is also ensured in secondary collisions.

Sensors in the doors and C-pillars ensure reliable and rapid activation of the airbags in a collision from the side or an offset impact.

The new Audi A6 Avant is also extremely well protected from the effects of rear impacts. It already satisfies the requirements of future standards. In other words, it withstands impact with a deformable barrier at up to 80 km/h and at least 70 percent overlap.

In such a collision both the passenger cell and the fuel tank remain outside the actual deformation area. The entire rear structure of the car undergoes deformation according to a defined pattern with the aid of large impact members, thus absorbing impact energy.

Active head restraints in the front seats protect the driver and front passenger from the consequences of a rear-end collision. Released mechanically, the head restraints move forward to reduce acceleration of the occupant's head as soon as possible as it shoots back.

Aerodynamics and aeroacoustics

More interior space, a wider track: the new Audi A6 Avant is significantly larger than its predecessor. Since this also means a larger frontal area, the task of the aerodynamics engineers was to compensate for this fundamental drawback with particularly intelligent design of the car's outer skin. And Audi's aerodynamics engineers have successfully mastered this challenge, achieving a drag coefficient (Cd) of just 0.31 for the new Audi A6 Avant 2.4.

Compared with its predecessor, which was also already developed to a very high standard of aerodynamic excellence, the overall drag factor (Cd x front area) of the new A6 Avant has been improved, depending on engine version, by 9 to 13 percent. And compared with its competitors, too, the A6 Avant is one of the leaders in terms of aerodynamic efficiency.

One feature that is particularly important in terms of aerodynamics is the full underbody panelling. Encapsulation of the engine compartment and transmission at the front end ensures a swirl-free flow of air to the central floor area, while wheel spoilers reduce flow losses around the front wheels. Large cover panels optimise the flow of air along the transmission tunnel all the way back to the rear wheels.

In all, the various improvements on the underfloor of the car reduce the drag factor by no less than 0.031 which, related to the car's overall drag coefficient, means an improvement of almost 11 percent.

Thanks to its aerodynamic underbody, this means that at a speed of 180 km/h the Audi A6 Avant consumes around six percent less than a comparable vehicle without a correspondingly modified underside.

Adaptive headlights and daytime running lights

Audi offers no less than two new features behind the clear-glass covers of the A6 Avant’s headlights: the dynamic technology of adaptive light, and daytime running lights in conjunction with xenon plus technology. The combination of these systems is an absolute world premiere, a USP offered only by Audi.

The new A6 Avant, too, comes with light units in Audi's typical "tube" look. Featuring anthracite-coloured trims, the tubes for the high and low beams appear to hover almost freely in the air, giving the front-end design of the car its very own touch of high-tech.

The headlights on the new A6 Avant come in three different versions: standard halogen headlights in free-form technology, xenon plus headlights and the xenon plus system with the dynamic adaptive light system that “see� around bends. It does this by pivoting the ellipsoidal module for the high-beam and low-beam headlights in synchronisation with the line of the road or a bend as the car is driven. This greatly improves illumination of the road in front of the vehicle and to the sides, making it easier for the driver to anticipate the course of the road ahead.

On the basis of several parameters including vehicle speed, steering angle and yaw rate, the system’s control function calculates the necessary change in the position of the headlights and communicates the necessary signals to the drive motor.

Daytime running lights for extra safety

The significant safety advantage provided by permanent operation of the headlights throughout the day was previously associated with increased energy consumption, with an extra 0.2 litres of fuel being consumed every 100 kilometres driven. This is why, with the exception of just a few countries, this technology is yet to be introduced throughout Europe. Yet there is evidence that daytime running lights help to enhance driving safety, particularly when the sun is low or when driving on the motorway or in built-up areas.

With the low and high beams in the xenon plus headlights being integrated into the same – the outer – unit, the inner reflector remains free for the use of daytime running lights. A dimmed bulb serves as the source of light, while the other lights are switched off. An increase in fuel consumption is practically eliminated.

LED rear lights

Alongside the basic version which uses conventional bulbs, the rear lights of the new A6 Avant are available with an LED unit for the brake and tail lights as an option in conjunction with xenon plus.

As well as a long operating life of at least 10,000 hours and energy consumption reduced by up to 80 percent, this main advantage of this technology is a much shorter response time. Whereas conventional bulbs take around 200 milliseconds to reach their full brightness, LEDs achieve their full output in less than one millisecond. Drivers following behind will thus recognise much more quickly that the brake lights have come on.

The LED unit for the tail lights also adds a striking, sporty touch at the rear of the car, their horizontal arrangement producing a wide and flat appearance.

Comfort and communication electronics

MMI - Multi Media Interface

In the guise of the integrated user interface MMI, Audi is now also offering an infotainment platform and operating concept for the new A6 Avant that combine ease of operation with perfect positioning and a consistent inner logic.

MMI thus reduces the driver's workload and enables him or her to concentrate fully on the main task of driving the car safely.

But this does not mean that the driver of the A6 Avant has to forego the benefits of modern infotainment and communication systems. On the contrary, MMI actually makes a greater range of functions available and is the ideal basis for incorporating further features in future.

With MMI having already set the standard in the luxury class in the Audi A8, it is now continuing its success story in the executive segment. The MMI system is available for the A6 Avant in three different configurations: MMI basic (standard), MMI basic plus, and MMI.

Control architecture

MMI in the first instance comprises the control panel (MMI terminal) in the centre console with a control button that can be turned and pressed. The control keys arranged around the control button have specific functions in the various menus.

On either side of the terminal – apart from the Return key for exiting the menu level – there are a total of up to eight function keys with which the user can call up the most important main menus directly.

The individual functions are subdivided into four groups in accordance with specific requirements: the Entertainment sub-group comprises the RADIO and CD/TV functions, the Communication sub-group is made up of TEL and NAME (address book for telephone numbers and navigation functions). NAV and INFO (for traffic information) form the Information group, CAR and SETUP are the Control group.

The terminal's position has been ergonomically optimised to ensure that the controls can be reached comfortably and without the driver having to change his or her seated posture while driving.

The second central MMI component, the MMI display, is located at the top end of the centre console exactly in the driver's line of vision.

The basic geometry of the screen representation corresponds in detail to the arrangement of the control keys and button on the MMI terminal, permitting an intuitive association between visual perception and hand movements.

In other words, the driver uses the top left control key to select the function displayed in the top left corner of the screen.

MMI

Fitted as an option with the full range of features, MMI comes with a 7-inch colour monitor in the new Audi A6 Avant. In addition to the high-quality audio system already featured with MMI basic plus, a double tuner and a six-disc CD changer are also included in the radio system.

Yet a further option also available in combination with MMI and MMI basic plus is the all-new BOSE surround sound system for particular listening pleasure: no fewer than five amplifier channels with a total output of 270 watts distribute sound around the listener like in a concert hall, creating a sound experience which sets new standards even in the luxury car class. The BOSE system in addition includes electronic adjustment to take account of the vehicle's specific level of background noise.

As on the A8, MMI can also be supplied with DVD navigation. A DVD provides more than ten times the storage capacity of a conventional CD ROM, coupled with a noticeably faster access time.

This kind of capacity is able to cover almost the entire Western European road network on one single data carrier, relieving the driver of the annoying job of changing the CD when crossing borders. A further advantage is that the navigation system calculates the route much more swiftly than on CD-based systems. This is particularly noticeable during map loading and when using the zoom function. This allows a flowing zooming in and out and enables the map to be moved in all four directions.

In addition, many more special navigation destinations can be stored on a DVD; these make it easy to find your destination swiftly even if you do not happen to know the name of the road.

Destinations and route options are entered in the conventional way via a menu in the MMI. As an alternative, the navigation system can also be operated using voice control.

MMI basic plus

As an option, the audio system of the Audi A6 Avant can be further upgraded by additional components. A TP memory function, for example, is able to record traffic announcements lasting up to four minutes.

Over and above the basic unit, MMI basic plus comes with a sound system incorporating a total of 10 loudspeakers (three-way combinations at the front and two-way combinations at the rear). Amplifier output power: 160 watts.

MMI basic plus can also be combined with a CD-based navigation system featuring optical route guidance using arrow pictograms and additional text information in the driver information system which are displayed directly in the driver's line of vision.

Destinations may be entered directly or, for particular convenience, via the NAME key in the MMI address book. Route planning takes all information provided by TMC traffic radio messaging into account.

MMI basic

The Audi A6 Avant comes as standard with MMI basic, featuring the terminal, a 6.5-inch monochrome display, as well as an integrated radio and single-disc CD player. Music output is via a 2x20 watt amplifier and four speakers in the front doors. Like all radios, the basic system comes with speed-dependent volume control and, thanks to the diversity aerial, excellent radio reception.

As well as the radio functions and the broadcasting of traffic information, numerous vehicle functions such as interior light configuration, air conditioning and various warning signals can be controlled via MMI, as on the Audi A8.

The components of the infotainment system are connected to each other and to the other vehicle electronics via an optical bus system (MOST).

Air conditioning

A decisive factor for ensuring the comfort of A6 Avant passengers is a highly efficient climate control system which is practically draught-free and virtually inaudible. This standard transfers the climatic comfort commonly found in the luxury class to the Avant.

Taking up a concept already well-proven in the Audi A8, the Audi A6 Avant with deluxe automatic air conditioning plus has perforated grilles on the top of the dashboard. This allows the occupants to enjoy practically draught-free ventilation, thus enhancing their comfort and well-being. At the rear there are additional ventilation louvres in the B-pillars which also provide a low-draught supply of air.

All Audi A6 Avant models come as standard with deluxe automatic air conditioning with recirculation and pollen filter as well as a sun sensor. Temperatures may be set separately for the driver and front passenger, and there are air vents on the centre console for rear passengers.

The optional deluxe automatic air conditioning plus system uses a temperature sensor dependent on the angle of the sun, an air quality sensor and a humidity sensor to analyse the in-car climate and automatically sets the temperatures selected by the driver and front passenger.

A residual heat function allows the driver to use waste heat from the engine for warming up the car after switching off the ignition.

Not only air temperature, but also air distribution and the intensity of air flow can be controlled separately by the driver and front passenger.

The centre vent also comes with separate temperature control which means that the temperature of the air emitted here can be regulated independently of the rest of the air. The advantage is obvious: while, for example, the side vents supply warm air to the side windows to prevent them from misting over, cool air can be supplied to head level from the centre vent. This considerably improves comfort and well-being for driver and front passenger alike. Air flow as such is controlled by the Setup menu on the air conditioning control panel.

Telephone systems

The new Audi A6 Avant can be fitted with either a mobile phone preparation or a built-in phone with Bluetooth technology. The customer opting for the mobile phone solution can connect his or her phone either using an electrical adapter or wirelessly by means of Bluetooth technology. The adapters have intelligent charging electronics and an interface to the outside aerial. The adapter is elegantly and practically integrated into the storage compartment in the centre armrest.

Regardless of how the mobile phone is connected, the most important functions can be operated via the MMI controls. The TEL key provides access to the operating menu as well as to the phone book integrated into the SIM card. The driver can also operate the most important telephone functions via the optionally available multifunction steering wheel without taking his or her hands off the wheel.

Like the A6 saloon, the A6 Avant is now also available with the option of a built-in dual-band phone featuring a cordless handset. Housed conveniently in the centre armrest, the cordless phone is connected to the control unit via Bluetooth. The operation and display of functions is fully integrated into the MMI system.

Advanced key access and authorisation system

Drivers of the new A6 Avant with automatic transmission will only have to reach for their car key from time to time in future: “advanced key� is an optional system that provides electronic access and authorisation.

The key – which can remain in the driver's pocket – incorporates an electronic pulse generator whose signal is registered and checked by a sensor. If the signal is accepted, the doors are unlocked as soon as the driver actuates the door handle.

The central locking can be activated and deactivated at any door of the vehicle. All the driver has to do is carry the key on his or her person within a range of about 1.5 metres from the car and actuate the door handle. It is possible to select via MMI whether the central locking should only release the manually actuated doors or unlock all of them.

The steering and ignition can also be released electronically and wirelessly before setting out thanks to advanced key. Provided the driver has the key on his or her person while inside the car, the steering is released by gently pressing the starter button. At the same time the ignition is activated and the electronic immobiliser released.

If the foot brake is operated simultaneously, the engine starts immediately. Since the starting procedure is fully automatic, a quick press of the starter button is all it takes. For safety reasons, the automatic selector lever must be in the "P" or "N" position.

The engine can of course also be started in the conventional way by turning the key in the ignition lock.

When leaving a vehicle equipped with advanced key, it merely suffices to press a small button under the door handles to lock all doors. Once again there is a dialogue between the key and the in-vehicle sensor: it is therefore impossible to lock the doors accidentally.

This system is not only convenient, it also benefits security. The mechanical ignition lock previously used has been replaced by an electronic version. The key identification process with advanced key is fully electronic and consequently enables the key to be clearly assigned to the right vehicle.

Light and rain sensor

All new Audi A6 Avant models come as standard with a combined light and rain sensor which automatically activates or deactivates the low-beam headlights and – in wet weather – the windscreen wipers and regulates their wiping speed.

Hidden discreetly out of sight, the system’s sensor technology is integrated into the bracket of the interior mirror at the top of the windscreen where it does not in any way obstruct the driver's view.

Two light sensors operating independently of one another determine both ambient brightness and light conditions in the direction of travel. Taking light and weather conditions as well as the speed of the car into account, a microprocessor permanently calculates whether it is necessary to switch on the low-beam headlights. The system is activated by turning the rotary light switch to the "Auto" position.

Another standard feature of the light sensor is the coming home/leaving home function. If the doors are unlocked with the remote control before getting in, the car’s exterior and interior lights are activated if it is dark. When the doors are locked, the system switches off the lights again after a certain time delay which can be programmed via the MMI to suit requirements.

The rain sensor determines the degree of moisture on the windscreen and, if appropriate, issues a wipe command to activate the wipers at the right speed. Again, controlling the system is a very easy process: the driver simply has to move the wiper stalk on the steering column to the intermittent position in order to permanently activate the rain sensor. The system will then be automatically reactivated every time the engine is started.

adaptive cruise control

An intelligent "travelling companion" is also available as an option on the new A6 Avant: the latest-generation adaptive cruise control, a radar-assisted distance control system. Supplementing the optional cruise control function, this system significantly enhances driving convenience by automatically controlling the speed of the car depending on the preselected distance to the vehicle ahead.

This noticeably reduces the driver's workload, particularly during long journeys on country roads or when driving on the motorway, especially in heavy nose-to-tail traffic.

Hidden discreetly out of sight, the system sensor is fitted behind the trim grille on the cooling air intake. While the car is on the move, it emits radar signals that determine how far ahead the next vehicle is.

Based on these measurements, a computer then establishes whether this distance is increasing or decreasing, and adjusts the car's own speed correspondingly by means of acceleration or by applying the brakes.

The Audi development engineers have deliberately limited the intensity of possible acceleration and that of brake intervention and very definitely designed the distance control as a convenience system. adaptive cruise control is designed such that when approaching another vehicle which is travelling at a completely different speed, the driver has to react consciously and in accordance with the situation in hand.

The driver can select the basic adaptive cruise control configuration on the MMI, where he decides which of three predefined programs is to be called up automatically each time the system is activated after starting the engine. The programs determine the dynamics of the distance control.

The current status of the system as well as the speed selected are indicated to the driver within the speedometer. Other important information appears in the display of the driver information system. The speed range used by the system is between 30 and 200 km/h.

In addition to these tried-and-tested convenience features, the new generation offers a further safety function in the form of interaction between adaptive cruise control and ESP. This predictive system – the first of its kind in Europe – reacts even before an impending accident.

The system permanently monitors the area in front of the vehicle and assesses potential hazards without interruption. If a critical situation is imminent, the brake system is prefilled; at the same time, the hydraulic brake assist is prepared for hard braking.

As soon as the driver has recognised the emergency situation and stepped on the brake, the hydraulic brake assist triggers a perfectly controlled emergency braking manoeuvre. This can reduce the braking distance decisively and help to prevent an accident.

Standard equipment

Even with the standard specification, the new Audi A6 Avant comes with a level of equipment which is by no means usual even in the luxury class. This high standard is immediately confirmed by the premium quality of materials and finish, adding a new dimension to luxury in the executive class.

For example, aluminium inlays in the door panels and dashboard as well as aluminium-look features such as the instrument surrounds, the MMI control button and the trim ring around the gearshift or selector lever knob all come as standard.

It goes without saying that electric front and rear windows are part of the standard specification, as are the electrically adjustable, heated door mirrors finished in the body colour. The central locking, comprising not just the doors, but also the windows, boot lid and fuel flap, is operated by remote control.

Seats with manual fore/aft and backrest angle adjustment as well as adjustment of seat height, inclination, belt height and the head restraint provide both the driver and front passenger with good side support and a high standard of comfort. The rear-seat backrest can be folded down either in an asymmetric 1/3 : 2/3 split or completely.

The seats are upholstered in Meridian cloth as standard. On the A6 Avant 4.2 quattro, the electrical adjustment of seat functions and the lumbar support as well as Volterra leather upholstery are also part of the standard package.

Deluxe automatic air conditioning with sun sensor and separate temperature controls for driver and front passenger ensures the highest level of comfort in all Audi A6 Avant models. A6 Avant 4.2 models come as standard with deluxe automatic air conditioning plus comprising a wide range of additional functions.

Your luggage also travels Business Class in the new Audi A6 Avant. Inside, this is emphasised both by the materials and finish of the luggage compartment and by its entirely new securing concept. Countless meticulously thought-out details set the benchmark for this class thanks to their versatility and variability.

All new A6 Avant versions have two securing rails recessed into the floor of the level, 1.05 metre wide load area (through-loading width). These are fitted with a total of four sliding, adjustable and lockable lashing eyes which can be used to secure items of luggage of practically any size to suit individual needs. All A6 Avant versions have bag hooks integrated into the luggage compartment trim, as well as an additional luggage net to one side and a 12-volt power socket. A lockable side compartment can be supplied as an optional extra, for keeping objects hidden from prying eyes.

The load floor can be folded up as a standard feature and can be locked in a variety of positions to divide up the load area. This not only provides scope for stowing objects between the rear seat backrest and the raised floor to prevent them from sliding around, but also provides access to the lower load area, into which a large plastic tray is integrated.

A feature that none of the competitors has to offer is the Multi Media Interface “MMI basic� comprising not only the 6.5-inch monochrome display, but also an integrated radio with CD player and two two-way speakers.

Halogen headlights in free-form technology with clear-glass covers, electrical headlight range control and a parking light function provide intensive and homogeneous illumination of the road ahead. Fog lamps in the front air dam are a further standard feature.

A light and rain sensor which controls the windscreen wipers and low-beam headlights fully automatically is also part of the standard specification. The light sensor comprises the “coming home/leaving home� function, a mechanism for switching on the car’s lights automatically or switching them off automatically after a specified delay when getting in and out of the car.

The comprehensive, all-round safety concept of the new A6 generation is also exemplary – as confirmed by the saloon in November 2004 when it received the highest score of 5 stars in the Euro NCAP test. It goes without saying that the new A6 Avant also meets the same high standards.

In the event of a collision the car's occupants are effectively protected by the robust structure of the body with predefined deformation and a highly stable passenger cell. Full-size front airbags and front side airbags as well as the head airbag system sideguard in conjunction with three-point inertia-reel seat belts on all seats, belt tensioners and belt-force limiters at the front offer both driver and passengers effective protection at all times.

The two full-size front airbags are activated in two stages, depending on the severity of the accident. Active front head restraints fitted as standard help to protect the occupants in a collision from behind.

Active safety benefits from the latest-generation electronic stabilisation program ESP 8.0 complete with hydraulic brake assist, anti-lock brake system ABS, electronic brake-force distribution EBD, the traction control system ASR and the electronic differential lock EDL.

New: the emergency braking function alerts vehicles behind to potential hazards by activating the hazard warning lights when the brakes are applied hard. Understeering control has been further optimised: when the vehicle understeers, the system no longer brakes just the two wheels on the inside of the bend; the brakes are applied to individual or even to all four wheels simultaneously, depending on the situation. This reduces the radius of the curve and the vehicle is kept reliably on track.

The trailer stabilisation function uses the ESP sensors to detect any swinging of the trailer and to stabilise it by automatically actuating the brakes.

The electromechanical parking brake provides a parking brake function when the car is stationary, a starting assist function by automatically releasing the brakes when pulling away and an emergency braking function at all four wheels when driving.

Also featured as standard, servotronic steering is a particular pleasure to use in combination with the new-generation four-spoke leather steering wheel which can be adjusted both vertically and axially.

16-inch cast aluminium wheels of 9-arm design, fitted with 205/60 R 16 tyres, are standard even on the basic versions of the new A6 Avant. The high-performance six-cylinder 3.2 FSI and 3.0 TDI models ride on forged lightweight wheels of 7-arm dynamic design, shod with 225/55 R16 tyres. The most powerful Audi A6 Avant, the 4.2 quattro, is fitted with 17-inch wheels of 16-spoke design and size 225/50 R17 tyres.

Optional equipment

The range of optional equipment available for the new Audi A6 Avant also leaves nothing to be desired. Just one example is the choice of 15 different paintwork colours.

Drivers of the new Audi A6 Avant will only have to actually use their car key on rare occasions: as on the Audi A8, “advanced key�, which is available as an option, acts as an electronic access and authorisation system. The key incorporates an electronic pulse generator whose signal is registered and checked by a sensor. If the signal is accepted, the system unlocks the doors as soon as the driver or passenger pulls the door handle.

The steering and ignition can also be released electronically and wirelessly before setting out thanks to advanced key. The engine is started by pressing the starter switch on the centre console.

Numerous trim options are available to provide a pleasant ambience inside the car: a wide range of leather and cloth versions as well as a number of different wood inlays provide sufficient scope for transforming every A6 Avant into an unmistakable, unique specimen.

The standard MMI basic system can be upgraded to MMI basic plus and MMI, both of which are options. The latter comes with a 7-inch colour display. Further components such as a TV tuner and a DVD navigation system can be added on request. Like the audio system, the navigation unit is also operated via the MMI terminal.

The BOSE surround sound system specially tuned to the A6 Avant guarantees outstanding listening pleasure: five amplifier channels distribute the sound around the listener as in a concert hall – an acoustic experience that sets new standards even in an executive-class car.

The BOSE system in addition includes electronic adjustment to take account of the vehicle's specific level of background noise. Customers wishing to keep out exterior noise even more effectively can opt for insulating glass. This offers the additional advantages of reducing the degree by which the cabin heats up in hot weather and improving protection against break-ins.

A hands-free car phone with cordless handset is available for the new A6 Avant for the first time. Bluetooth technology has not merely paved the way for cordless communication between the handset and the built-in base station. All important telephone functions can be activated both via the handset and the MMI terminal.

The voice control system for a great many infotainment functions enhances the ergonomic convenience of MMI even further.

Front sports seats, which are available as an option, ensure supreme comfort on long journeys and perfect side support. They also offer a wide range of adjustment functions: backrest and seat angle as well as the thigh support are all individually adjustable, as are the height and fore/aft position of the seat (also electrical as an option).

The comfort and well-being of all passengers can be enhanced with deluxe automatic air conditioning plus. Apart from separate air distribution and temperature control for the driver and front passenger, this sophisticated system provides indirect, draught-free ventilation, centre air vents with temperature control and an air humidity sensor. Other features include the residual heat function, automatic air recirculation and additional ventilation for rear passengers through the door pillars.

3-spoke leather-covered multifunction sports steering wheels are available in addition to a 4-spoke multifunction steering wheel with leather rim.

Additional functions, such as the shift paddles behind the steering wheel and a heating function, can be ordered as add-on modules.

The 3-spoke wooden sports steering wheel with multifunction control is a particularly attractive option; its rim is finished Walnut. This steering wheel may also be combined with shift paddles on models fitted with an automatic transmission. The gearshift or selector lever knob are also available in wood.

Numerous options can be ordered to enhance the luggage compartment’s variability and the rail system's versatility still further to suit individual requirements: a telescopic bar can be engaged into both rails to divide up the luggage compartment diagonally or horizontally, thus providing another means of reliably securing items of luggage. Additional support is provided by a retaining strap, which – when both ends are engaged in a rail – lashes objects down securely against the sides of the luggage compartment at the push of a button, or divides up the compartment transversely when engaged in both rails, to keep large, bulky items of luggage in place.

The cycle rack system, which has been developed specially for the A6 Avant and is likewise mounted on the rails and around the dirt-resistant tray, is a means of transporting two mountain bikes securely.

The large storage box for the luggage compartment is a particularly versatile item. Secured to the rails by means of the lashing eyes, it can be fitted in two different positions: with its opening facing to the rear, it can be used for storing smaller items of luggage and for dividing up the luggage compartment.

When pushed up flush against the rear seat with its opening facing forwards, the box can be accessed via the load-through facility in the rear seat and is thus transformed into a storage compartment that is well away from inquisitive eyes.

The improved reversible mat (option) has exclusive velour in the interior colour on one side; when turned over, its rubberised, easy-to-clean surface protects the load area floor. The reversible mat now also incorporates a fold-out section that can be pulled down over the bumper.

The removable ski and snowboard bag is another new feature that will be of particular interest to winter sports enthusiasts. Winter sports equipment can be packed away swiftly and easily in the bag outside the car, then stowed in the luggage compartment, avoiding snow or meltwater drips.

For the first time on an Audi, the tailgate opens and closes automatically at the push of a button. The opening process can also be initiated by pressing the button on the car key. The required opening angle – in other words, by how much the tailgate opens – is infinitely variable.

Even better visibility on the road is ensured by adaptive light including xenon plus. Featuring swivel headlight units, this dynamic cornering light system illuminates twists and turns in the road far more effectively above a speed of just 12 km/h. Xenon plus lighting includes daytime running lights and LED brake lights as standard.

The radar-assisted distance control system adaptive cruise control makes it much easier for the driver of the new Audi A6 Avant to keep a safe distance from vehicles ahead. Enhancing "regular" cruise control, which is also available as an option, this system significantly increases driving comfort by automatically regulating the speed of the car in relation to the preselected distance to the vehicle ahead.

Customers opting for adaptive air suspension will experience even greater driving pleasure in the new Audi A6 Avant.

Sports suspension with the body lowered by 20 millimetres is available as an option from launch. To match this there is a choice of different alloy wheels up to 18 inches in size, further refining the car's driving dynamics and sporty appearance.

Another convenient feature is the trailer hitch with mechanically swivelling ball head bar, offering quick and easy handling as and when required.