See also:

After the ignition is switched off
The roof can still be operated for approx. 1 minute, as long as no door has been opened. ...

Adjusting the volume
Turn the knob until the desired volume is selected. The setting is stored for the remote control currently in use. ...

Coolant temperature
Should the coolant, and with it the engine, become too hot, a Check Control message is displayed. Check the coolant level. ...