Mercedes-Benz GL-Class 2009 Owners Manual - Manual (Page 439)

Fuels, coolants, lubricants etc.
437
Gasoline additives (gasoline engine)
A major concern among engine
manufacturers is carbon build-up caused by
gasoline. Mercedes-Benz recommends only
the use of quality gasoline containing
additives that prevent the build-up of carbon
deposits.
After an extended period of using fuels
without such additives carbon deposits can
build up, especially on the intake valves and
in the combustion area, leading to engine
performance problems such as:
R Warm-up hesitation
R Unstable idle
R Knocking/pinging
R Misfire
R Power loss
In areas where carbon deposits may be
encountered due to lack of availability of
gasoline which contains these additives,
Mercedes-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
listing 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.
AdBlue ®
AdBlue ® is a non-flammable, non-toxic,
colorless and odorless, water-soluble liquid.
! Only use AdBlue ® complying with
ISO 22241. Do not blend with additives.
! Rinse surfaces that have come into
contact with AdBlue ® , or remove AdBlue ®
with a moist cloth and cold water
immediately. If AdBlue
® has crystallized
already, use cold water and a sponge.
AdBlue
® residues will crystallize and soil
the affected surfaces.
High ambient temperatures
If AdBlue ® in the reservoir heats up to above
122‡ (50†) for a long period of time, for
example due to direct sunlight, ammonia gas
vapors may escape when opening the
AdBlue
® tank.
G Warning!
When opening the filler cap of the
AdBlue
® tank ammonia gas vapors may
escape. Refill AdBlue ® in a well ventilated
area only. Ammonia gas vapors have a
pungent odor and are particularly irritating
for your skin, mucous membranes, and
eyes. Inhaling ammonia gas vapors will
cause burning eyes, nose, and throat, as
well as coughing and watering eyes.
Low ambient temperatures
AdBlue ® freezes at a temperature of
approximately 12‡ (-11†). Your vehicle is
factory equipped with an AdBlue
® preheating
system. The vehicle can thus be operated at
temperatures below 12‡ (-11†).
Technical data
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