See also:

Creating new contacts/changing contacts
In certain countries, this function stops being available from a vehicle speed of more than approximately 3 mph (5 km/h). As soon as the speed falls below approximately 2 mph (3 km/h), the f ...

Restoring the factory settings
•► Press the and buttons simultaneously for approximately six seconds until the battery check lamp flashes twice. ...

Charging the battery
WARNING Never charge a battery still installed in the vehicle unless a battery charger unit approved by Mercedes-Benz is being used. Gases may escape during charging and cause explosions th ...