See also:

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. ...

Important safety notes
WARNING Do not park this vehicle in areas where combustible materials can come into contact with the hot exhaust system. Do not park the vehicle on dry grassland or harvested grain fields. C ...

Deactivating/activating PARKTRONIC
1 Indicator lamp 2 To deactivate/activate PARKTRONIC If indicator lamp 1 lights up, PARKTRONIC is deactivated. Active Park Assist is then also deactivated. PARKTRONIC is automatically ac ...