See also:

Engine
Display messages   Top Up Coolant See Operator's Manual Possible causes/consequences and ► Solutions The coolant level is too low. ► Add coolant, observing the warning notes ...

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 Assistanc ...

Problems with the SmartKey
Problem Possible causes/consequences and  Solutions You cannot lock or unlock the vehicle using the SmartKey. The SmartKey battery is discharged or nearly discharged ...