Removing and Installing/Replacing Hydraulic Unit for DSC

34 51 527 - Removing and installing/replacing hydraulic unit for DSC (S85)





Necessary preliminary tasks:
- Read and comply with General Information Service and Repair.
- Remove front left wheel arch trim Service and Repair.
- Remove front left support.

After completing work: Bleed braking system Bleeding Brake System with DSC

Installation:
After reinstalling the hydraulic unit, carry out the following tasks with the DIS (Diagnosis and Information System):

- Mix-up check of brake lines
- Function check, hydraulic unit





Press clutch pedal down to floor and secure with pedal support.

Note:
The pedal support may only be released when the brake lines are reconnected.

This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.





Important!
Do not mix up brake lines.

If necessary, mark before removal.

Close off connection bores with plugs.





Disconnect plug connection (1).

Important!
Do not bend brake lines.

Unfasten brake lines (2).

Installation:
Tightening torque 34 32 1AZ 34 32 Brake Lines.

Release bolts (3) and remove hydraulic unit.





When replacing hydraulic unit:

- Release bolts (1) and modify bracket (2).
- Modify control unit Service and Repair