See also:

Automatic deactivation during forward travel
The system switches off when a certain driving distance or speed is exceeded. Switch the system back on if necessary. ...

Setting
Pull the switch. The LED lights up. The indicator lamp lights up in red. The parking brake is set. Lower lamp: indicator lamp in Canadian models Set the parking brake and further secur ...

Switching on/off manually
Press the button. On: the LED lights up. Off: the LED goes out. If Top View is displayed, switch on the backup camera via the iDrive. ...