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  • GLC
  • SUV
  • 03/2020
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Information on fuel grades for vehicles with petrol engines

Observe the notes on operating fluids More.

NOTE Damage caused by the wrong fuel

Even small amounts of the wrong fuel could result in damage to the fuel system, the engine and the emission control system.

Only refuel using unleaded, sulphur-free petrol that conforms to European EN 228, or an equivalent specification.

Fuel of this specification may contain up to 10% ethanol by volume. Your vehicle is suitable for use with E10 fuel.

Never refuel with one of the following fuels:
  • diesel

  • regular petrol with an octane number lower than 91 RON

  • petrol with more than 10% ethanol by volume, e.g. E15, E20, E85, E100

  • petrol with more than 3% methanol by volume, e.g. M15, M30

  • petrol with additives containing metal

If you have accidentally refuelled with the wrong fuel:

do not switch the ignition on.
consult a qualified specialist workshop.

The following compatibility indications for fuel apply to your vehicle:

For petrol with maximum 5% ethanol by volume
For petrol with maximum 10% ethanol by volume
According to European standard EN 16942 you can find the compatibility indications at the following locations:
  • on the vehicle on the information label on the fuel filler flap More.

  • on the fuel pump or pump nozzle suitable for your vehicle throughout Europe.

If the available fuel is not sufficiently low in sulphur, this can produce unpleasant odours.

The recommended octane number for your vehicle can also be found on the information label in the fuel filler flap More.

As a temporary measure, if the recommended fuel is not available, you may also use regular unleaded petrol with an octane number of at least 91 RON .

This may reduce engine output and increase fuel consumption.

Never refuel using petrol with an even lower RON .

Further information on fuel can be obtained at a filling station or a qualified specialist workshop.