See also:

Switching on DISTRONIC, storing andmaintaining the current speed
WARNING   The vehicle can be braked when DISTRONIC is activated. For this reason, deactivate DISTRONIC if the vehicle is to be set in motion by other means (e.g. in a car wash or by tow ...

Roadside Assistance button
Open the stowage compartment under the armrest. Press and hold Roadside Assistance button 1 for more than two seconds. This initiates a call to the Mercedes-Benz Customer Assistance Center ...

Activating/deactivating DSR
Activating DSR can only be activated if you are driving no faster than 20 mph (30 km/h). Vehicle without the Off-Road Pro Engineering package Vehicle with the Off-Road Pro Engineering package ...