Trunk / Liftgate Hydraulic Control Unit: Service and Repair

51 24 150 - Removing and installing/replacing hydraulic control unit for operating rear lid (electrohydraulic/fully automatic)





Necessary preliminary tasks:
- Move rear lid into service position Servicing Position of Rear Lid
- Remove left luggage compartment wheel arch trim
- Remove sound insulation from inside of wheel arch
- Have a cleaning cloth ready for escaping fluid

Important!
Follow instructions for automatic rear lid actuation Instructions for Automatic Rear Lid Actuation (Electrohydraulic/Fully Automatic) (electrohydraulic)





Release screw (1) and nuts (2) on bracket of hydraulic unit (3).





Unclip hydraulic lines (4) from bracket (5).
Take out hydraulic unit (1).
Disconnect hose coupling (2) (see next picture).
Detach hydraulic lines (4) upwards.

Note:
If the hydraulic unit is replaced or stays removed for an extended period of time, protect the bores in the hydraulic unit and the hose connections for the hydraulic cylinder against contamination.

If necessary, join hydraulic lines together.

Installation:
Check fluid level in hydraulic unit Instructions for Automatic Rear Lid Actuation (Electrohydraulic/Fully Automatic), correct if necessary.





To release the hose coupling: slide wire retainer (1)
- to right
- press wire retainer downwards
- detach coupling (2) upwards.