Communications Control Module: Service and Repair

84 11 660 - Removing and installing/replacing telematics control unit (TCU) (option SA633/SA639)





Important!
Read and comply with notes on protection against electrical damage (ESD protection) 61 35 ... Notes on ESD Protection (Electro Static Discharge).





Note:
Comply with notes and instructions on handling optical waveguides 61 00 ... Notes on Handling Optical Fibers.





Necessary preliminary tasks:
- Remove panel for luggage compartment partition
- Disconnect battery negative lead 61 20 900 Disconnecting and Connecting Battery Negative Lead





Unlock plug connections (1) and disconnect.
Unfasten aerial plug (2) and disconnect.
Release all nuts.
Remove TCU (3).

Installation Note:
Observe colour coding of aerial plugs (2).





Replacement:
- Carry out vehicle programming/coding Programming and Relearning