Fuel grade

damaging the catalytic converter. You should only refuel with unleaded premium-grade gasoline as this avoids damaging the catalytic converter.

If engine running problems are apparent, have the cause checked immediately and repaired. Excess unburned fuel can otherwise enter the catalytic converter, leading to overheating and possibly causing a fire.

injection system could be blocked by particles from the fuel can. Use a filter when refueling from a fuel can. Otherwise, the fuel lines and/or injection system could be blocked by particles from the fuel can.

number of 91 (average value of 96 RON/ 86 MON). Only refuel with premium-grade unleaded gasoline with a specified minimum octane number of 91 (average value of 96 RON/ 86 MON).

You will usually find information about the fuel grade on the pump. If you cannot find the label on the pump, ask the staff for assistance.

You can find more information under "Fuel" (), or by contacting an authorized Mercedes-Benz Service Center or visiting http://www.mbusa.com (USA only).

    See also:

    Engine oil viscosity
    Viscosity describes the flow characteristics of a fluid. If an engine oil has a high viscosity, this means that it is thick; a low viscosity means that it is thin. Select an engine oil with an ...

    Resetting the side windows
    If a side window can no longer be closed fully, you must reset it. - Close all the doors. - Turn the SmartKey to position 1 or 2 in the ignition lock. - Pull the corresponding switch on the doo ...

    Nuts & Bolts
    Overall reliability for the current C-Class has been average. In crash tests by the Insurance Institute for Highway Safety, the car earned the top score of Good in front, side, rear and roof-crush ...