See also:

Child safety
Electric operation The child safety function is activated by pressing button A. This deactivates the controls in the rear of the vehicle, both for the rear windows and for opening the rear door ...

RADIO - RDS - CD
...

Deactivation
In exceptional conditions (starting a vehicle which is bogged down, stuck in snow, on soft ground...), it may be advisable to deactivate the ASR and ESP systems, so that the wheels can move freel ...