See also:

Checklist before driving off-road
► Engine oil level: check the engine oil and top it up if necessary. The vehicle can only guarantee a smooth supply of oil on steep stretches if there is a sufficient level of engine oil ...

Problems with the SmartKey
Problem Possible causes/consequences and Solutions You cannot lock or unlock the vehicle using the SmartKey. The SmartKey battery is discharged or nearly discharged. ...

Problems with your vehicle
If you should experience a problem with your vehicle, particularly one that you believe may affect its safe operation, we urge you to contact an authorized Mercedes-Benz Center immediately to ...