See also:

Tow-starting (emergency starting)
Vehicles with automatic transmission must not be started by tow-starting. This could otherwise damage the transmission. ...

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 ...

Restoring the factory settings
Press the and buttons simultaneously for approximately six seconds until the battery check lamp flashes twice. ...