See also:

Using KEYLESS-GO
The KEYLESS-GO key must be outside the vehicle. All the doors must be closed. Touch recessed sensor surface 1 on the door handle until the side windows and the sliding sunroof or the panor ...

Snow chains
For safety reasons, Mercedes-Benz recommends that you only use snow chains which have been specially approved for your vehicle by Mercedes-Benz, or are of a corresponding standard of quality. ...

Unlocking the driver's door (mechanical key)
If the vehicle can no longer be unlocked with the SmartKey, use the mechanical key. If you use the mechanical key to unlock and open the driver's door, the anti-theft alarm system will be trigg ...