See also:

Sockets
The lighter socket can be used as a socket for electrical equipment while the engine is running or when the ignition is switched on. The total load of all sockets must not exceed 140 watts at ...

Tone
Only treble and bass can be set in the rear for headphones. The settings are made separately for the left and right headphones. Operation is the same as for the front tone. ...

Switching off automatically
System switches off: above approx. 9 mph/ 15 km/h. Switch on the system again if necessary. ...