octane number is the average value of the
Research Octane Number (RON) and Motor
Octane Number (MON): (RON + MON) / 2,
also known as knock resistance.
Reformulated Gasoline (RFG) and/or
unleaded gasoline with additives can be used
if the concentration of the additives in the fuel
does not exceed 10%, e.g.:
R
Ethanol
R
TAME
R
ETBE
R
IPA
R
TBA
For MTBE, the concentration should not
exceed 15%.
The concentration of methanol in gasoline
including other additives must not exceed 3%.
Using mixtures of methanol and ethanol is not
permitted. Gasohol, a mixture of 10% ethanol
and 90% unleaded gasoline can be used.
All of these mix fuels must fulfill the fuel
requirements, e.g.:
R
knock resistance
R
boiling point
R
vapor pressure
Diesel engines – important safety
information
!
Only use commercially available ULTRA-
LOW SULFUR DIESEL FUEL (ULSD, 15 ppm
MAXIMUM SULFUR) that meets the
ASTM D975 standard. Failure to use
ULTRA-LOW SULFUR DIESEL FUEL (ULSD)
can severely damage the vehicle's exhaust
gas aftertreatment system.
!
Do not fill the tank with gasoline. Do not
blend diesel fuel with gasoline or kerosene.
Otherwise, the fuel system and the engine
will be damaged. Damage resulting from
the use of gasoline or kerosene is not
covered by the Mercedes-Benz Limited
Warranty.
To prevent malfunctions, diesel fuel with
improved flow characteristics is available in
the winter months. Check with your fuel
retailer.
Information on the fuel grade can usually be
found on the gas pump. If the information
cannot be found on the gas pump, ask service
station personnel. For further information,
contact an authorized Mercedes-Benz Center
or visit
http://www.mbusa.com (USA
only).
Diesel engines – Fuels containing bio-
diesel (FAME [fatty acid methyl ester])
Mercedes-Benz USA approves the use of B5
(ULSD with a maximum of up to five percent
by volume biodiesel) for all diesel engines
with common rail direct injection (CDI) and
BlueTEC.
Pure biodiesel and diesel fuels that contain a
higher percentage of biodiesel, e.g. B20, may
cause damage to the fuel system/engine and
are, therefore, not approved.
For further information, please ask the
service station personnel. The label on the
gas pump must indicate clearly that the B5
biodiesel blend meets the ULSD standard. If
the label is not clear, do not refuel the vehicle.
The Mercedes-Benz Limited Warranty does
not cover damages caused by the use of fuels
not meeting Mercedes-Benz approved fuel
standards.
Additives in gasoline
One of the major problems in engine design
is the creation of carbon deposits during the
process of burning fuel. Mercedes-Benz
recommends that you use fuel brands that
have the additives which prevent the build up
of carbon deposits.
If you use fuels without these additives for a
longer period of time, there may be a build up
of carbon deposits, especially on the inlet
valves and in the combustion chamber.
This could lead to engine running problems,
e.g.:
R
warm-up hesitation
R
unstable idle
Service products and capacities
389
Technical data
BA 212 USA, CA Edition B 2011; 1; 5, en-US
dimargi
Version: 3.0.3.6
2010-05-20T13:33:46+02:00 - Seite 389
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