See also:

Removing a wheel
  Unscrew the wheel bolts. Do not place wheel bolts in sand or on a dirty surface. The bolt and wheel hub threads could otherwise be damaged when you screw them in.   Remove the w ...

Roadside Assistance button
X Press and hold Roadside Assistance button 1 for more than two seconds. This initiates a call to the Mercedes-Benz Customer Assistance Center. The indicator lamp in Roadside Assistance button 1 ...

Important safety notes
Have the batteries changed at a qualified specialist workshop. WARNING Batteries contain toxic substances. Swallowing batteries can lead to serious health issues or death. Keep batteries out ...