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  • V-Class
  • 06/2020
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Notes on fuel grades on vehicles with diesel engines
General notes

Observe the notes on operating fluids More.

WARNING Risk of fire from fuel mixture

If you mix diesel fuel with petrol, the flash point of the fuel mixture is lower than that of pure diesel fuel.

Never refuel using petrol in diesel engines.
Never mix petrol with diesel fuel.
NOTE Damage due to incorrect fuel

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

Only refuel using sulphur-free diesel fuel that conforms to the European standard EN 590 or an equivalent specification. In countries without sulphur-free diesel fuel, only fill up with low-sulphur diesel fuel with a sulphur content of less than 50 ppm.
Never refuel with:

  • petrol

  • marine diesel

  • heating oil

  • pure bio-diesel or vegetable oil

  • paraffin or kerosene

If you have accidentally refuelled with the wrong fuel:

do not switch on the ignition.
Consult a qualified specialist workshop.
NOTE Malfunctions due to contaminated fuel

Fuel contamination can lead to malfunctions in the fuel system.

If you are using drums or canisters to refuel the vehicle, you should filter the fuel before filling.
In accordance with the European standard EN 16942, you will find the compatibility marks for fuel in the following places:

  • on the vehicle on the instruction label in the fuel filler flap

  • throughout Europe on the fuel pumps or pump nozzles suitable for your vehicle

For diesel fuel with a maximum of 7% by volume bio-diesel (fatty acid methyl ester)
For paraffinic diesel fuel
XTL-compatible vehicles

Alternatively, you can also refuel with paraffinic diesel fuel (e.g. HVO=hydrogenated vegetable oil, GTL=Gas-To-Liquid) that complies with the European standard EN 15940. Paraffinic diesel fuels are collectively known as XTL.

Refuel with paraffinic diesel fuels to EN 15940 only if the appropriate compatibility mark is present in your fuel filler flap.

B10- fatty acid methyl ester

Mercedes-Benz approves the use of B10 fatty acid methyl ester (low-sulphur diesel fuel with a maximum of up to 10% by volume fatty acid methyl ester) for all vehicles with Euro 5 diesel engines with Common Rail Direct Injector (CDI).

You may only refuel with the approved fatty acid methyl ester if the fatty acid methyl ester proportion conforms to the ASTM D6751 Standard. It must also have the required oxidation stability of at least 6 h, in accordance with the EN 14112 Standard. The sulphur content of the diesel fuel may not exceed the limit values for the sulphur content of diesel fuel stated above. Only approved fatty acid methyl ester with this fuel grade can avoid damage being caused due to residue build-up and/or corrosion.

Pure fatty acid methyl ester and diesel fuel that has a higher percentage of fatty acid methyl ester, e.g. B20, could damage the fuel system and the engine.

The identification of the fatty acid methyl ester on the fuel pump must clearly indicate that it fulfils the standard for low-sulphur diesel fuel. If the identification is not clear, do not refuel.

Sulphur content
NOTE Damage to the emission control system in vehicles with a diesel particulate filter

If you refuel with diesel fuel whose sulphur content is too high, the emission control system may be damaged.

In countries without sulphur-free diesel fuel, refuel using only low-sulphur diesel fuel with a sulphur content less than 50 ppm.

Vehicle without diesel particulate filter: in countries in which only diesel fuel with a higher sulphur content is available, the vehicle's engine oil change is carried out at shorter intervals. Further information on oil change intervals can be obtained at a qualified specialist workshop.

Information about current country-specific sulphur content is available:

  • from any Mercedes-Benz service centre

  • at MB BeVo-ONLINEunder the specifications on Sheet No. 136.2

Notes on low outside temperatures

Refuel your vehicle with as much winter diesel fuel as possible at the beginning of winter.

Before switching to winter diesel fuel, the fuel tank should be as empty as possible. When first refuelling with winter diesel fuel, only refuel using a small amount, e.g. to reserve level. When refuelling the next time, the fuel tank can be filled normally again.

Further information on fuel is available:

  • at a filling station

  • at a qualified specialist workshop