Vacuum Brake Booster: Service and Repair

34 33 505 - Removing and installing/replacing brake booster





Necessary preliminary tasks:
- Read and comply with General Information Service and Repair
- Remove brake master cylinder Removing and Installing/Replacing Master Brake Cylinder for DSC
For cars with S85 engines:

- Remove vacuum pump
- Remove bracket for vacuum pump
- Remove vacuum line





Detach locking clip (1) from brake pedal, disengage and pull out locking pin.

Unscrew nuts (2).

Installation Note:
Replace self-locking nuts.

Tightening torque 35 11 1AZ 35 11 Pedal Assembly Console.





Remove non-return valve (1) from brake booster.

Carefully pull brake booster (2) out of bulkhead and tilt out.

Installation:
Replace seal between brake booster and bulkhead.

Important!
Do not use any force when removing and installing the brake unit; the brake unit can be damaged under certain circumstances.