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Self Leveling Suspension: Overview Audi A6 C5 facelift

Electronic Suspension 11 illustrations ~1222 words

Air supply unit, assembly overview

Tightening torque for all air lines on the Audi A6 is 2 Nm (9 in. lb).

Note. The following list refers to items in (Scheme 226).

  1. Clip
  2. Air line See «MARKINGS»(ref-196275-S22179200122005100800000) .
  3. Connection piece
  4. Hex nut M 6
  5. Sheet-metal screw
  6. Sheet-metal piece For centering valve unit
  7. Rubber seal
  8. Housing cover
  9. Top foam piece
  10. Valve unit
  11. Air compressor
  12. Gasket Always replace
  13. Bottom foam piece
  14. Unit housing
  15. Hex bolt, 10 Nm When reinstalling use safeguard material D 000 600 A2
  16. Bonded fiber mat Only A6 Avant Preformed bonded fiber mat is glued onto bottom shell of unit
  17. Air line From compressor to solenoid valve See «MARKINGS»(ref-196275-S22179200122005100800000) .

Scheme 226

Scheme 226
Scheme 226

Air line routing (front wheel drive), assembly overview

Tightening torque for all air lines on the Audi A6 is 2 Nm (9 in. lb).

Note. The following list refers to items in (Scheme 228).

  1. Clip
  2. Air line Air supply unit to air spring Clip air lines into markings provided for them. See «MARKINGS»(ref-196275-S22179200122005100800000) .
  3. Air supply unit Removing and installing, see «AIR UNIT MOUNT, ASSEMBLY OVERIEW»(ref-196275-S27419546522005100800000)
  4. Shock absorber
  5. Connection piece See «MARKINGS»(ref-196275-S22179200122005100800000) .
  6. Clip clip onto shock absorber
  7. Air line Air supply unit to air spring See «MARKINGS»(ref-196275-S22179200122005100800000) .
  8. Clip Clip onto parking brake cable
  9. Air line Air spring to shock absorber See «MARKINGS»(ref-196275-S22179200122005100800000) .
  10. Stone impact protection plate
  11. Cable ties
  12. Connection piece See «MARKINGS»(ref-196275-S22179200122005100800000) .

Scheme 227

Scheme 227
Scheme 227

Scheme 228

Scheme 228: Markings
Scheme 228: Markings

Make sure correct color markings -A- go with associated position markings of attachment clips or grommets -B

Air-spring shock absorbers (front wheel drive), assembly overview

Tightening torque for all air lines on the Audi A6 is 2 Nm (9 in. lb).

Note. The following list refers to items in see scheme 27.

  1. Sealing ring
  2. Air spring Removing and installing, see «AIR SPRINGS, REMOVING AND INSTALLING»(ref-196275-S21782737542005100800000)
  3. Connection piece See note under «MARKINGS»(ref-196275-S22179200122005100800000) and «CONNECTOR SYSTEM»(ref-196275-S15485721402006051800000).
  4. Combi bolt, 5 Nm
  5. Stone impact protection plate
  6. Spring support
  7. Protective sleeve
  8. Stop buffer
  9. Clip
  10. Air line Clip air lines into markings provided for them. See «MARKINGS»(ref-196275-S22179200122005100800000).
  11. Connection piece See «MARKINGS»(ref-196275-S22179200122005100800000).
  12. Shock absorber
  13. Hex bolt, 45 Nm
  14. Installation cap Only for factory installation, not used for repairs.
  15. Self-locking hex nut, 25 Nm Loosening and tightening see scheme 28Always replace after disassembly
  16. Top shock absorber mount

Scheme 229

Scheme 229
Scheme 229

Level sensor (front wheel drive), assembly overview

  1. Hex-nut, tighten to 3 Nm. See «LEVEL SENSOR (FRONT WHEEL DRIVE), REMOVING AND INSTALLING»(ref-196275-S31912826852005100800000) .
  2. Level sensor
  3. Coupling link
  4. Level sensor bracket
  5. Double hex bolt, 25 Nm
  6. Hex-nut, tighten to 10 Nm.
  7. Socket-head bolt,4 Nm
  8. Hex-nut, tighten to 5 Nm.
  9. Cable ties
  10. Hex-nut, tighten to 10 Nm.

Scheme 230

Scheme 230
Scheme 230

Air line routing (all wheel drive), assembly overview

Tightening torque for all air lines on the Audi A6 is 2 Nm (9 in. lb).

Note. The following list refers to items in see scheme 37.

  1. Clip
  2. Air line Clip the air lines into markings provided for them. See «MARKINGS»(ref-196275-S22179200122005100800000) .
  3. Connection piece See «MARKINGS»(ref-196275-S22179200122005100800000) .
  4. Hex nut M 6
  5. Air supply unit Removing and installing, see «AIR UNIT MOUNT, ASSEMBLY OVERIEW»(ref-196275-S27419546522005100800000)
  6. Hex bolt, 10 Nm
  7. Air spring
  8. Shock absorber
  9. Clip
  10. Left sensor bracket Removing and installing, see «AIR LINE FROM SENSOR TO AIR SPRING SHOCK ABSORBER»(ref-196275-S25472944122006051800000)
  11. Hex-nut, tighten to 10 Nm.
  12. Bracket Removing and installing, see «AIR LINE FROM SENSOR TO AIR SPRING SHOCK ABSORBER»(ref-196275-S25472944122006051800000)
  13. Hex-nut, tighten to 10 Nm.
  14. Grommet
  15. Cable ties Left 1x Right 3x

Scheme 231

Scheme 231
Scheme 231

Air spring shock absorbers (all wheel drive), assembly overview

Tightening torque for all air lines on the Audi A6 is 2 Nm (9 in. lb).

Note. The following list refers to items in see scheme 39.

  1. Self-locking hex nut, 27 Nm Always replace after disassembly First remove air compressor plugs
  2. Air spring Installing, «INSTALLATION OF AIR STRUT»(ref-196275-S28355643792006051800000)
  3. Shock absorber
  4. Clip
  5. Self-locking nut, tighten to 70 Nm plus additional 90 ° turn Always replace after disassembly
  6. Washer
  7. Air spring shock absorbers
  8. Hex bolt M12 x 1.5 x 95 Always replace after disassembly
  9. Connection piece See «MARKINGS»(ref-196275-S22179200122005100800000) .
  10. Air line Clip the air lines into markings provided for them. See «MARKINGS»(ref-196275-S22179200122005100800000) .
  11. Connection piece See «MARKINGS»(ref-196275-S22179200122005100800000) .
  12. Hex bolt, 45 Nm

Scheme 232

Scheme 232
Scheme 232

Level sensor (all wheel drive), assembly overview

Note. The following list refers to items in see scheme 48.

  1. Coupling link
  2. Level sensor
  3. Level sensor bracket
  4. Socket-head bolt, 4 Nm
  5. Washer
  6. Self-locking hex nut, 40 Nm
  7. Hex-nut, tighten to 3 Nm. See «LEVEL SENSOR (FRONT WHEEL DRIVE), REMOVING AND INSTALLING»(ref-196275-S31912826852005100800000) .
  8. Hex nut, tighten to 3 Nm. See «LEVEL SENSOR (FRONT WHEEL DRIVE), REMOVING AND INSTALLING»(ref-196275-S31912826852005100800000) .
  9. Stabilizer bar
  10. Combi bolt, 10 Nm
  11. Clamp
  12. Lever

Scheme 233

Scheme 233
Scheme 233

Rear air spring shock absorbers (Allroad), assembly overview

Note. The following list refers to items in see scheme 70.

  1. Self-locking hex nut, 27 Nm Always replace after disassembly first remove air compressor plugs
  2. Air spring Installation, see «INSTALLATION OF AIR STRUT»(ref-196275-S38594719382006051800000)
  3. Shock absorber
  4. Clip
  5. Selflocking nut, tighten to 70 Nm plus additional 90 turn Always replace after disassembly
  6. Washer
  7. Air spring shock absorbers
  8. Hex bolt M 12 x 1.5 x 95 Always replace after disassembly
  9. Connection piece See «MARKINGS»(ref-196275-S22179200122005100800000) .
  10. Air line Clip the air lines into markings provided for them. See «MARKINGS»(ref-196275-S22179200122005100800000) .
  11. Connection piece See «MARKINGS»(ref-196275-S22179200122005100800000) .
  12. Hex bolt, 45 Nm

Scheme 234

Scheme 234
Scheme 234

Pressure reservoir, assembly overview

Note. The following list refers to items in see scheme 73.

  1. Voss -connector system Tightening torque: 2Nm
  2. Hex nut Tightening torque: 23Nm
  3. Pressure reservoir A system venting of the pressure reservoir must be performed before removing pressure reservoir. See «SYSTEM VENTING (ALLROAD)»(ref-196275-S03407686742005100800000) .
  4. Muffler
  5. Hex nuts(3x) Tightening torque: 3Nm
  6. Bracket
  7. Combination bolt Tightening torque: 23Nm

Scheme 235

Scheme 235
Scheme 235

Component overview

All plastic air connections must be tightened to 2 Nm.

The plastic air connections must be bolted in between marks on air hose. See MARKINGS .

Note. The following list refers to items in see scheme 121.

  1. Electrical connection compressor drive
  2. Intake- /exhaust line
  3. Air dryer
  4. Level Control Pump Temperature Sensor -G290
  5. Auxiliary noise insulation
  6. Level Control Pressure Sensor -G291- The 4 suspension strut valves -N148-,-N149-, -N150-,N151- and Level Control Accumulator Valve -N311- are incorporated in one valve unit. Tightening torque for bolt in center of valve unit between connections:4 Nm Securing valve block to base plate.3.5 Nm
  7. Compressor
  8. Electric motor
  9. Pneumatic vent valve
  10. Solenoid for level control system -N111
  11. Pressure line, 2 Nm
  12. Pressure line connection at compressor Color mark:Black
  13. Connection left front suspension strut Color mark:Red
  14. Connection pressure reservoir Color mark:Yellow
  15. Connection right rear suspension strut Color mark:Blue
  16. Connection left rear suspension strut Color mark:Gray
  17. Connection right front suspension strut Color mark:Green

Scheme 236

Scheme 236
Scheme 236

General information

Exclusive use is to be made of approved oil for filling or topping off . See Parts catalog.

Replacement shock absorbers and lines are supplied empty.

Filling is to be performed only at ambient temperature (approx. 20° C).

Shock absorbers are only to be filled in the installed position.

Line and shock absorber must be drained, evacuated and filled separately.

Vehicle must not be allowed to stand on its wheels when DRC system is open (for example, open line/shock absorber connection).

Valves on filling appliance are open when shutoff levers are in parallel with direction of flow.

Draining, evacuation or filling of lines is to be performed in area of rear axle/spare wheel well. Pay attention to the following

  1. Remove heat shield in area of exhaust system.
  2. Unfasten bolted joint of center unit at spare wheel well.
CAUTIONLines are not to be bent.

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