See also:

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. ...

Automatic locking
The setting is stored for the remote control currently in use. 1. "Settings" 2. "Door locks" 3. Select the desired function: ▷ "Lock if no door is opened" T ...

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