Mercedes-Benz CLS Operator's Manual page 368

In some countries, the fuel available may not have
sufficient additives. Deposits could build up in the
fuel injection system as a result. In this case, in
consultation with a qualified specialist workshop
(e.g. a Mercedes-Benz service centre), mix the
fuel with the cleaning additive recommended by
Mercedes-Benz. Observe the notes and mixing
ratios indicated on the tank.
▌Information on fuel quality for vehicles with a
diesel engine
General notes
Observe the notes on operating fluids
( page 362).
/
& 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
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engines.
Never mix petrol with diesel fuel.
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* 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.
Vehicles with a diesel particulate filter:
Only refuel using sulphur-free diesel fuel
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that conforms to European standard
EN 590, or an equivalent specification.
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:
Only refuel using diesel fuel with a sul-
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phur content less than 500 ppm.
Never refuel with one of the following fuels:
Petrol
R
Marine diesel
R
Heating oil
R
Technical data 365
Pure fatty acid methyl ester or vegetable
R
oil
Paraffin or kerosene
R
If you have accidentally refuelled with the
wrong fuel:
Do not switch on the vehicle.
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Consult a qualified specialist workshop.
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The following compatibility indications for fuel
apply to your vehicle: