Procedures

AR42.20-P-0530-02SX Condition brake shoes of electric parking brake

Modification Notes:

Commercially Available Tools:

Workshop Equipment:

Component Identification:

1 Switch off the Electronic Stability Program ESP; to do this, press the ESP Off switch (S6/2s11) in the cockpit switch group (S6/2).

In order to avoid an active brake intervention of the Electronic Stability Program ESP.

ESP warning lamp (A1e41) in instrument cluster (A1) must light up.

2 Drive the vehicle with the rear axle onto the roller brake test stand and shift the transmission into position "N" with the engine running

Have the wheels of the rear axle driven by the roller brake test stand for at least 10 seconds. In order to avoid damage the brake shoes are then applied with a delay.

3 Press electric parking brake switch (S76/15) once briefly.

The brake shoes are brought into contact with the parking brake drums within 8 seconds, the roller brake test stand switches off.

4 Loosen parking brake by pulling electric parking brake switch (S76/15)
5 Allow the parking brake to cool down for approx. 3 minutes.
6.1 Vehicles with code Z07 Top protection: Repeat process 4 times.

In order to avoid damage to the brake system, it is essential to comply with cooling down phases

6.2 Vehicles without code Z07 Top protection: Repeat process 3 times.

In order to avoid damage to the brake system, it is essential to comply with cooling down phases

7 Drive the vehicle off the roller brake test stand.
8 Switch on the Electronic Stability Program ESP; to do this, press the ESP Off switch (S6/2s11) in the cockpit switch group (S6/2).

ESP warning lamp (A1e41) in instrument cluster (A1) must go out.

If the roller brake test stand is not available, condition parking brake using STAR DIAGNOSIS. Run through the following steps: Select menu item "chassis"/"EFB-electric parking brake"/"commissioning"/"bed in the brakes". Then process all the individual steps.