See also:

Folding the rear seat backrest back
•► Move the driver's or front-passenger seat forward if necessary. ! Make sure that the seat belt does not become trapped when folding the rear seat backrest back. Otherwise, it could b ...

General notes
If you cannot lock or unlock the vehicle with the SmartKey, either the battery in the SmartKey is discharged, the SmartKey is faulty or the starter battery is discharged. Check the battery in ...

Charging the batter
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 explosio ...