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366 Technical data
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:
diesel
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Gasoline with more than 10% ethanol by
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volume, e.g. E15, E85, E100
Gasoline with more than 3% methanol by
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volume, e.g. M15, M30, M85, M100
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.
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Vehicles with M256 gasoline engine: if you
are using 91 AKI/95 RON, there may be slight
limitations in performance that have no fur-
ther consequences.
Refuel only with premium-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 use regular unlea-
ded gasoline. Note the octane number on the
information label on the fuel filler flap
(
page 165). Filling up with regular unleaded
/
gasoline can reduce engine output and increase
fuel consumption.
Never refuel using gasoline of an even 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 in the fol-
lowing locations:
At a gas station
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At a qualified specialist workshop
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USA only: on the https://www.mbusa.com
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▌Information on additives in gasoline (vehicles
with gasoline engine)
Observe the notes on operating fluids
(
page 364).
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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.
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