Clutch System, Bleeding

Clutch System, Bleeding

Special tools, testers and auxiliary items required

• Brake Filler/Bleeder Unit (VAS 5234)

• Specification of brake fluid, refer to => Brakes and Traction Control Brakes and Traction Control

Procedure

• After working on the hydraulic clutch mechanism, the system must be bled.

• Before bleeding, you must bring clutch pedal back to rest position and fill brake fluid reservoir to "max" mark with brake fluid.

• First open bleeder valve, before switching on brake filler/bleeder unit.

• For the following work step, make sure no brake fluid leaks onto transmission.

• Perform clutch system bleeding in intervals with brake system bleeding.

- Connect Brake Filler/Bleeder Unit (VAS 5234) but do not switch on yet.

- Remove rear noise insulation - 2 to 3 - if equipped.





Vehicles with 6 and 8-cylinder engine.

- If equipped, remove noise insulation cover - arrows - in left wheel housing.





- Remove left drive axle heat shield - arrows -.





Continued for all vehicles

- Connect bleeder hose - A - to clutch slave cylinder - arrow - and open bleeder valve.





- Connect bleeder hose with collector bottle vacuum hose.

- Now switch on brake filler/bleeder unit and bleed approximately 100 cm3 of brake fluid.

• Working pressure 2.5 bar

• Ensure correct bleeder hose seating during bleeding process.

- Close bleeder valve with 4.5 Nm.

- Depress clutch pedal several times after completion of bleeding process.

- Bleed system again if necessary.

- Attach drive axle heat shield to the transmission, if equipped.

Tightening Specifications