Antilock Brake System

DETERMINING SYSTEM TYPE
All vehicles that are equipped with traction control will use the Mecatronic I/II system. Vehicles that are equipped with ABS only may be equipped with a Mecatronic II or a Mecatronic III system, depending on the date the vehicle was built. The Mecatronic I/II and Mecatronic III systems can be distinguished from one another by the number of hydraulic brake tubes on the top of the hydraulic control unit (HCU), located under the brake power booster, and the location of the ABS module harness connector.

MECATRONIC I/II

Fig. 44 HCU Brake Tube Removal:

- Four brake tubes enter the top left hand side of the HCU.
- Two brake tubes enter the lower left hand side of the HCU.
- Two ABS module harness connectors.
- ABS module harness connectors located on the right hand side of the HCU.

MECATRONIC III

HCU Brake Tubes, Mecatronic III:

- Six brake tubes enter the top of the HCU, three on both the right and left hand sides.
- A single ABS module harness connector.
- ABS module harness connector located on the left hand side of the HCU.