Procedures

Removing And Installing Electronic Stability Program (ESP) Hydraulic Unit

Connections On The Traction Systems Hydraulic Unit (A7/3):

Remove/Install

DANGER:
- Risk of poisoning from swallowing brake fluid. Risk of injury from brake fluid coming into contact with skin and eyes.
- Pour brake fluid only into suitable and appropriately marked containers. Wear protective clothing and safety glasses when handling brake fluid.

CAUTION:
- See notes on handling brake fluid
- See notes on repairs to brake system

1 Ignition OFF
2 Clean traction systems hydraulic unit (A7/3) around the line connections
3 Detach brake lines

NOTE: Mark hydraulic lines in relation to corresponding connections before disconnecting. Trace line routing to the corresponding wheel.

CAUTION: Seal off brake lines and connections to prevent foreign objects from entering the system.

4 Unlock and unplug ESP control module connector (42)
5 Unscrew traction systems hydraulic unit (A7/3) from bracket and remove

CAUTION: Installation: Rinse off any escaped brake fluid in the area of the frame side member with water in order to avoid paint damage.

6 Install in the reverse order
7 Bleed brake system.

Inspect
8 Check brake system for leaks
9 Perform basic programming
10 Read out fault memory with STAR DIAGNOSIS and erase if necessary

NOTE: After completion of the work, it is necessary to process and erase the DTCs stored in the DTC memory during assembly and testing work due to disconnected lines and simulation.