The system must be deactivated prior to these operations:
Work on the hydraulic system.
Removal or installation brake pads.
Exchange of brake calipers.
Exchange of brake discs.
Replacement of the brake systems pressure reservoir.
Replacement of the brake operating unit.
Replacement of the hydraulic unit.
Note:
Unwanted build up of the brake pressure must be avoided when working on the brake calipers
To prevent brake pressure build up, the pressure reservoir must be emptied and the automatic start-up of the reservoir charge pump must be blocked.
The brake fluid level in the expansion reservoir rises and may overflow.
The following may cause pressure to build up automatically:
Opening a door.
Operating the central locking system.
Depressing the brake pedal.
Test prerequisites:
The pressure reservoir is emptied.
The start of the reservoir charge pump is prevented.
Procedure:
Choose the function: “Deactivate system SBC”, press "OK".
The warning buzzer will sound as long as the system is deactivated.
After the work has been done choose the function ”Activate system SBC” to activate the system.