Mercedes-Benz GLS Owner's Manual page 435

432 Technical data
1 For petrol with maximum 5% ethanol by vol‐
ume
2
For petrol with maximum 10% ethanol by vol‐
ume
According to European standard EN 16942 you
can find the compatibility indications at the fol‐
lowing locations:
on the instruction label on the fuel filler flap
R
on the fuel pump or pump nozzle suitable for
R
your vehicle throughout Europe
If the available fuel is not sufficiently low in sul‐
phur, this can produce unpleasant odours.
The recommended octane number for your vehi‐
cle can also be found on the instruction label in
the fuel filler flap ( page 215).
/
As a temporary measure, if the recommended
fuel is not available, you may also use regular
unleaded petrol with at least 91 RON. This may
reduce engine output and increase fuel con‐
sumption.
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.
Information on additives in petrol
Observe the notes on operating fluids
( page 429).
/
* NOTE Damage from use of unsuitable
additives
Even small amounts of the wrong additive
may lead to malfunctions occurring.
Only add cleaning additives recommen‐
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ded by Mercedes-Benz to the fuel.
Mercedes-Benz recommends that you use
brand-name fuels with additives.
In some countries, the fuel available may not
have sufficient additives. Residue could build up
in the fuel injection system as a result. In this
case, in consultation with 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 grades for vehicles with
a diesel engine
General notes
Observe the notes on operating fluids
( page 429).
/
& 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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