See also:

Ventilation
Advice on interior settings ...

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 ...

Switching off
The ambience lighting switches off automatically when the sidelamps are switched off. It can be switched off manually using the instrument panel lighting rheostat button. With the lighting on ...