See also:

What to do if...
Only a black screen is visible. Switch on the system. There are no options available on the screen. Switch over between the display screens. Radio stations or TV channels are grayed out ...

Profile management
Opening the profiles A different profile can be called up than the one associated with the remote control currently in use. 1. "Settings" 2. "Profiles" 3. Select a profil ...

Maintenance
The battery is maintenance-free, i.e., the electrolyte will last for the life of the battery. Your service center will be glad to advise you on questions regarding the battery. ...