ABS General Information

ABS General Information

For ABS Mark 25, only the following version is installed in this vehicle:

• ABS/EDL/ASR with electronic stabilization program (ABS/EDL/ASR/ESP).

The ABS brake system is divided between front and rear. The vacuum brake servo unit boosts the brakes pneumatically.

Malfunctions on the ABS influence the brake system and servo assist. A change in braking behavior should be checked. When the ABS indicator lamp is on, the rear wheels may lock prematurely during braking!

Vehicles with ABS Mark 25 do not have a mechanical brake pressure regulator. A specially coordinated software program in the control module determines brake pressure allocation at the rear axle.

Control module - 1 - and hydraulic unit - 2 - comprise a single unit. Separation is possible. The hydraulic pump - 3 - must not be separated from the hydraulic unit.






New control modules as a replacement part are not coded. They must be coded following installation. Code the control module using vehicle diagnostic tester (VAS 5051) in Guided Fault Finding.