Body Control Systems: Service and Repair

Transponder (key)
Replacement or servicing of the transponder integrated with the vehicle keys is not possible. In the event of transponder malfunction, the complete key assembly requires replacement.

NOTE:
- If an ignition key is replaced or another ignition key is required, the new ignition key must always be adapted to the immobilizer.
- If radio-frequency unit (transmitter for radio operated central locking) of ignition key is replaced, it must be adapted to the comfort system.

Anti-theft immobilizer, adapting ignition key
- Connect Vehicle Diagnosis, Testing and Information System VAS 5051/5052
- Select operating mode "Guided Fault Finding"
- Enter information as prompted and press ">" to confirm.

After the DTC memory of all control modules has been checked:
- Use "Go to" button to select "Function / Component Selection"
- Select "Body"
- Select "Electrical system int/ext"
- Select "01 - Self-diagnosis"
- Select "Immobilizer"
- Select "Functions"
- Select "Ignition key adaptation"
- Press ">" to confirm.
- Follow tester prompts

Comfort system, adapting ignition key
- Connect Vehicle Diagnosis, Testing and Information System VAS 5051/5052
- Select operating mode "Guided Fault Finding"
- Enter information as prompted and press ">" to confirm.

After the DTC memory of all control modules has been checked:
- Use "Go to" button to select "Function / Component Selection"
- Select "Body"
- Select "Repair work int/ext"
- Select "01 - Self-diagnosis"
- Select "46 - Central module comfort system"
- Select "Functions"
- Select "Adaptation"
- Press ">" to confirm.
- Select "Ignition key adaptation"
- Follow tester prompts