See also:

Activating/deactivating DSR
Activating DSR can only be activated if you are driving no faster than 20 mph (30 km/h). Vehicle without the Off-Road Pro Engineering package Vehicle with the Off-Road Pro Engineering package ...

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. ...

SmartKey
You have put the wrong SmartKey in the ignition lock. Use the correct SmartKey. The SmartKey is in the ignition lock. Remove the SmartKey. The SmartKey nee ...