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 the SmartKey and replace it if necessary.
- Unlock the driver's door using the mechanical key.
- Lock the vehicle using the mechanical key.
- Have the starter battery and the battery contacts checked at a qualified specialist workshop.

If the SmartKey is faulty, contact Roadside Assistance or a qualified specialist workshop.

    See also:

    Gasoline
    Fuel grade You should only refuel with unleaded premium-grade gasoline as this avoids damaging the catalytic converter. If engine running problems are apparent, have the cause checked immediat ...

    Redialing
    The on-board computer saves the last names or numbers dialed in the redial memory. ► Press the button on the steering wheel to select the Telephone menu. ► Press the button to swi ...

    Removing a wheel
    AMG vehicles: during removal and repositioning of the wheel, the wheel rim can strike the ceramic-brake disc and damage it. Therefore, take precautions and get a second person to assist you. ...