Mercedes-Benz GLE Coupe 2023 Operator's Manual page 394

392 Technical data
Gasoline with additives containing metal
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If you have accidentally refueled with the
wrong fuel:
Do not switch on the vehicle.
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Consult a qualified specialist workshop.
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If the available fuel is not sufficiently low in sulfur,
it may produce unpleasant odors.
Refuel using only fuel that has at least the octane
number specified on the information label on the
fuel filler flap ( page 175). Otherwise, engine
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output may be reduced and fuel consumption
increased.
For maximum engine output: refuel using only pre-
mium-grade unleaded 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 regular
unleaded gasoline with at least 87 AKI/91 RON.
This may reduce engine output and increase fuel
consumption.
Never refuel using gasoline with a lower RON.
* NOTE Premature engine wear through
unleaded regular gasoline
Impairment of the longevity and performance
of the engine.
If unleaded premium grade gasoline is unavail-
able and you have to refuel using unleaded
regular gasoline:
Only fill the fuel tank to half full with
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unleaded regular gasoline and refill as
soon as possible with unleaded premium
grade gasoline.
Do not drive at the maximum design
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speed.
Avoid sudden acceleration and engine
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speeds over 3000 rpm.
Further information on fuel is available at the fol-
lowing locations:
At a gas station
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At a qualified specialist workshop
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On the https://www.mbusa.com (USA only)
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▌Information on additives in gasoline (vehicles
with gasoline engine)
Observe the notes on operating fluids
( page 390).
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* 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. Deposits could build up in the
fuel injection system as a result. In this case, in
consultation with a qualified specialist workshop
(e.g. an authorized Mercedes-Benz Service Cen-
ter), mix the fuel with the cleaning additive recom-
mended by Mercedes-Benz. Observe the notes
and mixing ratios indicated on the tank.