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Fuels, coolants, lubricants etc.
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Do not exceed an engine speed of
3 000 rpm if the vehicle is loaded with a
light load such as two persons and no
luggage.
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Do not exceed
2
/
3
of maximum acceler-
ator pedal position if the vehicle is fully
loaded or operating in mountainous ter-
rain.
Fuel requirements
Only use premium unleaded gasoline. The
octane number (posted at the pump) must be
91 min. It is an average of both the Research
Octane Number (RON) and the Motor Octane
Number (MON): (RON+MON)/2. This is also
known as the ANTI-KNOCK INDEX.
Reformulated gasolines (RFG) and/or
unleaded gasoline containing oxygenates
such as ethanol, TAME, ETBE, IPA, IBA, and
TBA can be used provided the ratio of any one
of these oxygenates to gasoline does not
exceed 10%; MTBE must not exceed 15%.
The ratio of methanol to gasoline must not
exceed 3% plus additional cosolvents.
Using mixtures of ethanol and methanol is not
allowed. Gasohol, which contains 10% etha-
nol and 90% unleaded gasoline, can be used.
These blends must also meet all other fuel
requirements, such as resistance to spark
knock, boiling range, vapor pressure, etc.
Gasoline additives
A major concern among engine manufactur-
ers is carbon build-up caused by gasoline.
Mercedes-Benz recommends only the use of
quality gasoline containing additives that pre-
vent the build-up of carbon deposits.
After an extended period of using fuels with-
out such additives carbon deposits can build
up, especially on the intake valves and in the
combustion area, leading to engine perform-
ance problems such as:
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Warm-up hesitation
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Unstable idle
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Knocking/pinging
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Misfire
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Power loss
In areas where carbon deposits may be
encountered due to lack of availability of gas-
oline which contains these additives, Mer-
cedes-Benz recommends the use of additives
approved by us for use on Mercedes-Benz
vehicles.
Contact an authorized Mercedes-Benz Center
or visit www.mbusa.com (USA only) for a list-
ing of approved product(s). Follow directions
on product label.
Do not blend other fuel additives with fuel.
This only results in unnecessary cost and may
be harmful to the engine operation.
!
Damage or malfunction resulting from
poor fuel quality or from blending additional
fuel additives other than those tested and
approved by us for use on Mercedes-Benz
vehicles are not covered by the Mercedes-
Benz Limited Warranty or by any pre-owned
or Extended Limited warranties.
Coolants
The engine coolant is a mixture of water and
anticorrosion/antifreeze, which provides:
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Corrosion protection
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Freeze protection
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Boiling protection (by increasing the boiling
point)
The cooling system was filled at the factory
with a coolant providing freeze protection to
approximately -35‡ (-37†) and corrosion
protection.
Technical data
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