Removing and Installing/Replacing Control Unit for Trailer Tow Hitch Unlocking

71 60 100 - Removing and installing/replacing control unit for trailer tow hitch unlocking





Necessary preliminary tasks:
- Open luggage compartment floor trim panel 51 47 101 Removing and Installing/Replacing Luggage Compartment Floor Trim Panel
- Remove spare wheel
- Remove cover for control units





Important!
Depending on the equipment specification, the position of the control unit for trailer tow hitch unlocking (2) can vary.

Remove control unit (2) and disconnect plug connection (1).





Replacement:
A control unit of the fully automatic trailer tow hitch with is not initialized indicates this by way of the LED in the button.
Initialization sequence:
- If necessary, connect battery charger
- Ignition off
- Rear lid open
- Press and hold down button for fully automatic trailer tow hitch
The ball hitch must in the process be pivoted at least once completely from one end stop to the other.
If initialization is successful and the ball hitch is in an end position, the LED on the button is permanently lit green.