See also:

Cleaning the exterior lighting
  Clean the plastic lenses of the exterior lights with a wet sponge and a mild cleaning agent, e.g. Mercedes-Benz car shampoo or cleaning cloths. Only use cleaning agents or cleaning ...

Activating cruise control
You can adopt the current speed if you are driving faster than 20 mph (30 km/h). – Accelerate the vehicle to the desired speed. – Briefly press the cruise control lever up 1 or down 2. – Remo ...

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 ...