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:

    Manual drive program
    Switching on the manual drive program The manual drive program is only available for AMG vehicles. Manual drive program M is different from drive programs S and S+ with regard to spontaneity, ...

    Before changing a fuse
    Park the vehicle and apply the parking brake. Switch off all electrical consumers. Remove the SmartKey from the ignition lock. The fuses are located in various fuse boxes: fuse box on th ...

    Exhaust check
    WARNING Inhalation of exhaust gas is hazardous to your health. All exhaust gas contains carbon monoxide (CO), and inhaling it can cause unconsciousness and possible death. Do not run the engi ...