See also:

Switching on/off
Press the button. ...

Radar sensor
Position Radar sensor Dirty or covered sensor A dirty or covered sensor may hinder the detection of vehicles. ▷ If necessary, clean the radar sensor. Remove layers of snow and ice care ...

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. ...