See also:

Useful information
This Operator's Manual describes all models and all standard and optional equipment of your vehicle available at the time of publication of the Operator's Manual. Country-specific differences ...

Setting the rear-compartment airflow using the rear control panel
Turn the SmartKey to position 2 in the ignition lock. To increase/reduce: press rocker switch 14 up or down. ...

Roadside Assistance button
  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 but ...