Mercedes-Benz GLS 2023, Operator'S Manual

Page: 416 / 538

#
Change immediately out of clothing that
has come into contact with fuel.
Flexible-fuel vehicles can be refueled with the fol-
lowing fuel types:
R
premium-grade unleaded gasoline
R
E85 fuel
R
a mixture of E85 fuel and premium-grade
unleaded gasoline
Flexible-fuel vehicles can be identified by the
Ethanol up to E85 sticker on the inside of the fuel
filler flap.
Depending on the country, the fuels you can use
in your vehicle may differ from the information in
the Operator's Manual. The fuels that have been
approved for your vehicle can be found on the
instruction label on the inside of the fuel filler flap.
Fuel
Notes on fuel grades for vehicles with a gasoline
engine
Observe the notes on operating fluids
(
/
page 412).
* 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 with low-sulfur unleaded fuel.
This fuel may contain up to 10% ethanol by vol-
ume. Your vehicle is suitable for use with E10
fuel.
Never refuel with one of the following fuels:
R
Diesel
R
Gasoline with more than 10% ethanol by
volume, e.g. E15, E85, E100
R
Gasoline with more than 3% methanol by
volume, e.g. M15, M30, M85, M100
R
Gasoline with additives containing metal
If you have accidentally refueled with the
wrong fuel:
#
Do not switch on the ignition.
#
Consult a qualified specialist workshop.
If the available fuel is not sufficiently low in sulfur,
this can produce unpleasant odors.
Only refuel with fuel that has at least the octane
number specified in the instruction label in the
fuel filler flap (
/
page 201). This may reduce
engine output and increase fuel consumption.
If you want maximum engine output: only refuel
with unleaded premium grade gasoline with an
octane number of at least 91 AKI/95 RON.
As a temporary measure, if the recommended fuel
is not available, you may also refuel with unleaded
regular gasoline with at least 87 AKI/91 RON.
This may reduce engine output and increase fuel
consumption.
Never refuel using gasoline with an even lower
RON.
*
NOTE Premature wear caused by unlea-
ded regular gasoline
Unleaded regular gasoline can cause the
engine to wear more quickly and impair lon-
gevity and performance.
414 Technical data