61 20 908 Battery "power reset" (to program/encode control unit(s))
WARNING: This page is about a different variant/trim than selected.
IMPORTANT:
Observe SAFETY INSTRUCTIONS FOR HANDLING VEHICLE BATTERY .
The following steps must be carried out for a "power reset":
- Switch off and disconnect battery charger
- Switch off ignition
Cars with ignition key: Turn ignition key to 0 position
Cars with ID transmitter: Remove identification sensor from slot
Cars with comfort access system: Secure terminal 30
- Disconnect battery negative terminal
- Reconnect battery negative terminal (to ensure bus activity)
- Waiting time (5-10 seconds)
- Disconnect battery negative terminal
- Waiting time (1 minute)
- Connect battery negative terminal and tighten. Refer to 61 21 1AZ .
- Connect and switch on battery charger
- Switch ignition on