See also:

Changing the set speed
When DSR is activated, the set speed can be changed to a value between 1 mph and 10 mph (Canada: between 2 km/h and 18 km/h) during the journey. – To increase or decrease the set speed in 1 ...

Important safety notes
Do not leave the SmartKey in the trunk/cargo compartment. You could otherwise lock yourself out. WARNING When leaving the vehicle, always remove the SmartKey from the ignition lock. Always ...

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. ...