HCU (Hydraulic Control Unit): Removal

NOTE: Store the Hydraulic Control Unit in an upright position only.

1. Disconnect the ground cable at the battery. The ignition switch must be switched to the off position when disconnecting the battery cable. 
2. Disconnect the multiplug from the control module. See Fig 1.
3. Disconnect the brake lines from the hydraulic control unit. See Fig 1. Mark the brake lines for reinstallation, also seal off the connections and lines to prevent contamination. 
4. Remove the hydraulic control unit from the bracket. See Fig 1.
5. Check the rubber mounts on the bracket. (Replace if necessary). See Fig 1.

Fig 1: HYDRAULIC CONTROL UNIT (ABS)

Courtesy of DAIMLERCHRYSLER CORP.

1 - BRAKE LINES

2 - HCU WITH CONTROL MODULE

3 - ABS/ABD CONTROL MODULE MULTIPLUG

4 - RUBBER SUPPORT