See also:

System self-test
The 42 indicator lamp illuminates when you: • turn the SmartKey to position 1 or 2 in the ignition lock • on vehicles with KEYLESS-GO, press the Start/Stop button once or twice The indicator ...

Making adjustments in 5 mph (Canada: 10 km/h) increments
Briefly press the cruise control lever beyond the pressure point, up 1 for a higher speed or down 2 for a lower speed. The last speed stored is increased or reduced. ...

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. ...