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Audi 2008 A6 Quattro Manual
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Audi 2008 A6 Quattro Manual

Suspension suspension, wheels, steering
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43 - SELF LEVELING SUSPENSION
SETTINGS FOR AIR SPRING SUSPENSION, AND CONNECTING VAS 5051 AND SELECTING
FUNCTIONS
Settings for air spring suspension, and connecting VAS 5051 and selecting functions
Possible level control settings --> Possible level control settings.
Adjusting vehicle level --> Vehicle level, adjusting.
Vehicle jack mode --> Vehicle jack mode.
Operating with something in tow --> Operating with something in tow.
Shipping mode --> Shipping mode.
VAS 5051 , connecting and selecting functions --> VAS 5051 , connecting and selecting functions
Possible level control settings
Driver can set four different level settings:
Automatic
Dynamic
Comfort
Lift
NOTE:
The automatic control procedures are dependent on speed and time. For
example, raising vehicle to the height setting is not possible above certain
speeds.
For further details on level settings: Operating instructions.
Vehicle level, adjusting
Vehicle level is set in the MMI.
Switch on ignition.
Press "CAR" function button. The central menu "adaptive air suspension" appears.
Select desired level via control knob.
NOTE:
Note that not every vehicle level can be selected in every driving situation.
FIXYOURCAR
FIXYOURCAR
2008 Audi A6 Quattro
2008 Audi A6 Quattro
SUSPENSION Suspension, Wheels, Steering
SUSPENSION Suspension, Wheels, Steering
1:42:04 AM
1:42:00 AM
Page 1
Page 1

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Summary of Contents for Audi 2008 A6 Quattro

  • Page 1 2008 Audi A6 Quattro 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering SUSPENSION Suspension, Wheels, Steering 43 - SELF LEVELING SUSPENSION SETTINGS FOR AIR SPRING SUSPENSION, AND CONNECTING VAS 5051 AND SELECTING FUNCTIONS Settings for air spring suspension, and connecting VAS 5051 and selecting functions Possible level control settings -->...
  • Page 2 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering For further information on vehicle levels: Operating instructions. Vehicle jack mode Before raising vehicle using vehicle jack or lifting platform, the vehicle jack mode must be activated so that the automatic control procedures of the air spring suspension, do not impede the lifting using vehicle jack or lifting platform.
  • Page 3 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Switch on ignition. Press "CAR" function button. The central menu "adaptive air suspension" appears. Press "SETUP" function button. The menu "adaptive air suspension" appears. Turn control knob to "Towing mode" and select "OFF" to switch off towing operation.
  • Page 4 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering If shipping mode has been activated, it is not possible to actuate a different vehicle level via MMI. Activating and deactivating Connect tester VAS 5051 and select functions --> VAS 5051 , connecting and selecting functions Then "Suspension".
  • Page 5 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 462: Diagnostic Cable VAS 5051/5A Courtesy of VOLKSWAGEN UNITED STATES, INC. Diagnostic cable VAS 5051/5A CAUTION: Test equipment must always be secured on the rear seat during a road test. Drivers must NEVER operate these tools while driving.
  • Page 6 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 464: Identifying Volkswagen Tester VAS 5051, On Switch Courtesy of VOLKSWAGEN UNITED STATES, INC. Switch on tester - arrow -. Tester is ready for operation when it displays buttons for its operating modes.
  • Page 7 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering "On Board Diagnostic (OBD) capable systems". "Control module for vehicle level control system". "Functions of Level Control System Control Module -J197-". "Suspension". "Level control system" "On Board Diagnostic (OBD) capable systems". "Control module for vehicle level control system".
  • Page 8 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Electrical/electronic components and component locations, overview Fig. 465: Electrical/Electronic Components And Component Locations, Overview Courtesy of VOLKSWAGEN UNITED STATES, INC. 1 - Right Front Body Acceleration Sensor G342 Removing and installing --> Left Front Body Acceleration Sensor G341 and Right Front Body Acceleration Sensor G342 , removing and installing Can be checked in "Guided Fault Finding"...
  • Page 9 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Charging --> System bleeding or charging 3 - Level Control System Control Module J197 Removing and installing --> Level Control System Control Module J197 , removing and installing 4 - Left Front Body Acceleration Sensor G341 Removing and installing -->...
  • Page 10 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Removing and installing --> Rear Vehicle Level Sensor , removing and installing After loosening, adapt control position again --> Control position, adapting again Can be checked in "Guided Fault Finding" using VAS 5051 A 12 - Right Rear Level Control System Sensor G77 Removing and installing -->...
  • Page 11 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Level Control System Sensor G78 and Right Front Level Control Sensor G289. They send electrical signals to Left High-intensity Gas Discharge Lamp Control Module/Right High-intensity Gas Discharge Lamp Control Module J343/344. Servicing Left High-intensity Gas Discharge Lamp Control Module/Right High-intensity Gas Discharge Lamp Control Module J343/344 -->...
  • Page 12 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 466: Identifying Harness Connector, Hex Nut, And Hex Bolt Courtesy of VOLKSWAGEN UNITED STATES, INC. Disconnect harness connector - 3 -. Remove hex nut - 2 -. Remove hex bolt - 1 -.
  • Page 13 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Control Module J343/344. Servicing Left High-intensity Gas Discharge Lamp Control Module/Right High-intensity Gas Discharge Lamp Control Module J343/344 --> 94 - LIGHTS, SWITCHES - EXTERIOR . At front axle, these signals are relayed from Left Front Level Control System Sensor G78 and Right Front Level Control Sensor G289 to Left High-intensity Gas Discharge Lamp Control Module/Right High-intensity Gas Discharge Lamp Control Module J343/344.
  • Page 14 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 467: Identifying Harness Connector And Bolts Courtesy of VOLKSWAGEN UNITED STATES, INC. Disconnect harness connector - 3 -. Remove bolt - 1 -. Remove bolts - 2 - using angled wrench. Do not bend upper retaining plate when doing this.
  • Page 15 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 469: Identifying Harness Connector And Bolts Courtesy of VOLKSWAGEN UNITED STATES, INC. Install bolt - 1 -. Connect harness connector - 3 -. Tightening torques: --> Trapezoidal control arm, upper control arm, tie rod, coil spring, level control system sensor, assembly overview Adapt control position again -->...
  • Page 16 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering NOTE: Front body acceleration sensors are installed at top in wheel housing respectively on left and right sides. Remove wheel. Fig. 471: Identifying Connector, Nuts, And Body Acceleration Sensor Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Page 17 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Checking body acceleration signal --> Body acceleration signal of front/rear body acceleration sensors, checking. Rear Body Acceleration Sensor G343 , removing and installing Special tools, testers and auxiliary items required Fig. 473: Torque Wrench V.A.G 1331 Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Page 18 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 474: Identifying Connector, Nuts, And Rear Body Acceleration Sensor G343 Courtesy of VOLKSWAGEN UNITED STATES, INC. Disconnect connector - 1 -. NOTE: Note installation position of rear body acceleration sensor. Remove nuts - arrows - and remove Rear Body Acceleration Sensor G343 - 2 -.
  • Page 19 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 475: Identifying Connector, Nuts, And Rear Body Acceleration Sensor G343 Courtesy of VOLKSWAGEN UNITED STATES, INC. NOTE: Points of - arrows - - 3 - of rear body acceleration sensor must point in direction of travel.
  • Page 20 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 476: Identifying Lid For Lower Glove Compartment Cover Courtesy of VOLKSWAGEN UNITED STATES, INC. Remove lid - A - from lower cover of glove compartment - B -. NOTE: The lid - A - is secured in lower cover of glove compartment - B - via 4 locking mechanisms.
  • Page 21 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 478: Identifying Bolts, Control Module, And Electrical Harness Connector Courtesy of VOLKSWAGEN UNITED STATES, INC. Connect electrical harness connectors - arrows -. Install bolts - 1 - and tighten to 2 Nm.
  • Page 22 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering "Left Front Body Acceleration Sensor -G341-". "Right Front Body Acceleration Sensor -G342-". "Rear Body Acceleration Sensor -G343-". System bleeding or charging Connect VAS 5051 A , perform vehicle-specific entries in Guided Fault Finding and select "Function/component selection"...
  • Page 23 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Control position, adapting again Connect VAS 5051 A , perform vehicle-specific entries in Guided Fault Finding and select "Function/component selection" via Goto button --> VAS 5051 , connecting and selecting functions. Then "Suspension"...
  • Page 24 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 480: Air Lines, Overview Courtesy of VOLKSWAGEN UNITED STATES, INC. 1 - Air intake tract with filter 2 - Right front suspension strut (air spring suspension) 3 - Connector for air lines...
  • Page 25 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Replacing connecting piece --> Connecting piece, replacing. 5 - Right rear air spring 6 - Connector for air lines Component location: Below right rear wheel housing liner 7 - Pressure reservoir Pressure reservoir is installed in luggage compartment, under dirt tray cover, under luggage compartment floor.
  • Page 26 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Servicing air line --> Air line, servicing Replacing connecting piece --> Connecting piece, replacing. 15 - Air supply unit with solenoid valve block Line assignment on solenoid valve block Line assignment on solenoid valve block 16 - Air line "brown"...
  • Page 27 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 482: Component Location Of Air Line Connector Courtesy of VOLKSWAGEN UNITED STATES, INC. Connections - 1 - , - 2 - and - 3 - for air lines leading to rear axle are attached in vehicle interior on front passengers side behind A-pillar trim.
  • Page 28 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 483: Identifying Special Tools For Air Line Courtesy of VOLKSWAGEN UNITED STATES, INC. Special tools, testers and auxiliary items required Torque wrench V.A.G 1783 Insertion tool 10 mm V.A.G 1783/1 Air hose pliers VAS 6228 If air line is damaged, the damaged area can be replaced.
  • Page 29 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering front suspension strut (air spring suspension) and solenoid valve block is replaced completely by original equipment line. Air line between solenoid valve block and left front suspension strut (air spring suspension) can be replaced with parts from repair kit in left and right wheel housings.
  • Page 30 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 485: Identifying Sealing Rings, Edges, And Cutting Ring Courtesy of VOLKSWAGEN UNITED STATES, INC. Slide old air line through sealing rings - 1 - and - 2 -. Then slide air line using slight pressure through edges - 3 - and - 4 - of cutting ring up to stop - 5 - in connection.
  • Page 31 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 486: Identifying Special Tools For Air Line Courtesy of VOLKSWAGEN UNITED STATES, INC. Special tools, testers and auxiliary items required Torque wrench V.A.G 1783 Insertion tool 10 mm V.A.G 1783/1 Air hose pliers VAS 6228 If connection leaks, air line can be shortened approx.
  • Page 32 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Remove connecting piece and remove air line. Remove cutting ring from air line. Using air hose pliers VAS 6228 , cut air line at a right angle behind pressure point of cutting ring.
  • Page 33 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 488: Identifying Transportation Caps, Air Line, Safety Devices, And Connecting Piece Courtesy of VOLKSWAGEN UNITED STATES, INC. Remove protective transportation caps - 2 - and - 3 - only immediately prior to connecting air line - 4 -.
  • Page 34 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 489: Air Supply Unit And Solenoid Valve Block, Assembly Overview Courtesy of VOLKSWAGEN UNITED STATES, INC. 1 - Air intake tract with filter 2 - Bracket for compressor unit and solenoid valve block 3 - Solenoid valve block Removing and installing -->...
  • Page 35 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Removing and installing --> Level Control Pump Temperature Sensor G290 , removing and installing 7 - Rubber bushing 8 - Spring seat 9 - Spring 10 - Sleeve 11 - Self-locking nut, 6 Nm...
  • Page 36 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering 23 - Bolt, 20 Nm Tightening torques Component Connecting piece in solenoid valve block 2 Nm Connecting piece in air supply unit 2 Nm Connecting piece in rear air spring 2 Nm...
  • Page 37 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 490: Identifying Special Tools For Air Spring At Rear Axle Courtesy of VOLKSWAGEN UNITED STATES, INC. Special tools, testers and auxiliary items required Torque wrench V.A.G 1331 Torque wrench V.A.G 1783 Insertion tool 10 mm V.A.G 1783/1...
  • Page 38 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 492: Identifying Air Line And Harness Connectors Courtesy of VOLKSWAGEN UNITED STATES, INC. Slowly loosen air line - 1 - of air supply unit and let air pressure dissipate. Once air pressure has dissipated, remove air lines.
  • Page 39 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 494: Identifying Nuts For Air Supply Unit Courtesy of VOLKSWAGEN UNITED STATES, INC. Remove nuts - 1 - , - 2 - and - 3 - and remove air supply unit.
  • Page 40 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 496: Identifying Nuts For Air Supply Unit Courtesy of VOLKSWAGEN UNITED STATES, INC. Sleeve - B - without collar - arrow - is installed on outer side of vehicle - 2 -.
  • Page 41 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 498: Open End Spanner Insert AF 10 V.A.G 1783/1 Courtesy of VOLKSWAGEN UNITED STATES, INC. Insertion tool 10 mm V.A.G 1783/1 Removing NOTE: Level Control System Solenoid N111 is installed on air supply unit under right front wheel housing liner.
  • Page 42 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 500: Identifying Electrical Harness Connector, Level Control System Solenoid, O-Rings And Threaded Connections Courtesy of VOLKSWAGEN UNITED STATES, INC. Disconnect electrical harness connector from level control system solenoid and remove threaded connections - 1 -.
  • Page 43 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 501: Identifying Electrical Harness Connector, Level Control System Solenoid, O-Rings And Threaded Connections Courtesy of VOLKSWAGEN UNITED STATES, INC. Coat O-rings - 5 - and - 6 - with grease supplied.
  • Page 44 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 502: Identifying Electrical Harness Connector, Level Control System Solenoid, O-Rings And Threaded Connections Courtesy of VOLKSWAGEN UNITED STATES, INC. Install threaded connections - 1 - and tighten --> Air supply unit and solenoid valve block, assembly overview.
  • Page 45 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Removing NOTE: Level Control Pump Temperature Sensor G290 is installed on air supply unit under right front wheel housing liner. Position vehicle on lifting platform --> Placing vehicle onto lifting platform and onto wheels.
  • Page 46 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 505: Identifying Bolt, O-Rings, Housing, And Level Control Pump Temperature Sensor Courtesy of VOLKSWAGEN UNITED STATES, INC. Remove bolt - 1 - and pull out Level Control Pump Temperature Sensor - 3 -.
  • Page 47 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Slide Level Control Pump Temperature Sensor - 3 - into housing - 2 - up to stop. Install bolt - 1 - and tighten to specified tightening torque --> Air supply unit and solenoid valve block, assembly overview.
  • Page 48 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Install wheel. Position vehicle on its wheels --> Placing vehicle onto lifting platform and onto wheels. Tighten wheel --> 44 - Wheels, Tires, Wheel alignment. Solenoid valve block, removing and installing Special tools, testers and auxiliary items required Fig.
  • Page 49 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Position vehicle on lifting platform --> Placing vehicle onto lifting platform and onto wheels. Perform system bleed using VAS 5051 A --> System bleeding or charging. Remove decorative wheel cover, for light- alloy wheels remove protective cap (use pulling hook in vehicle tool kit).
  • Page 50 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Installing Installation is in reverse order of removal. Note the following: Fig. 513: Identifying Bolts For Solenoid Valve Block Courtesy of VOLKSWAGEN UNITED STATES, INC. Insert solenoid valve block. Install bolts - 1 - and tighten --> Air supply unit and solenoid valve block, assembly overview.
  • Page 51 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Pressure reservoir, removing and installing Special tools, testers and auxiliary items required Fig. 515: Torque Wrench V.A.G 1783 Courtesy of VOLKSWAGEN UNITED STATES, INC. Torque wrench V.A.G 1783 Fig. 516: Open End Spanner Insert AF 10 V.A.G 1783/1 Courtesy of VOLKSWAGEN UNITED STATES, INC.
  • Page 52 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Removing and installing dirt tray cover --> 70 - INTERIOR TRIM . Fig. 517: Loosening Air Line On Pressure Reservoir And Letting Air Pressure Dissipate Courtesy of VOLKSWAGEN UNITED STATES, INC. Slowly loosen air line - 1 - on pressure reservoir - 2 - and let air pressure dissipate. Once air pressure has dissipated, remove air line - 1 -.
  • Page 53 2008 Audi A6 Quattro SUSPENSION Suspension, Wheels, Steering Fig. 519: Identifying Peg, Bores, And Pressure Reservoir Courtesy of VOLKSWAGEN UNITED STATES, INC. Insert peg - B - first, then peg - A - into bores - C - and swivel pressure reservoir 90 ° into loading compartment.