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236 Technical data
* NOTE Damage due to incorrect fuel
Even small amounts of the wrong fuel could
result in damage to the fuel system, the
engine and emission control system.
Never refuel with:
Gasoline
R
Marine diesel
R
Heating oil
R
Pure bio-diesel or vegetable oil
R
Paraffin or kerosene
R
Do not mix such fuels with diesel fuel
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and do not use any special additives.
If you have accidentally refueled with the
wrong fuel, observe the following:
Do not switch on the ignition.
#
Consult a qualified specialist workshop.
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* NOTE Malfunctions due to contaminated
fuel
Fuel contamination can lead to malfunctions
in the fuel system.
If you are using drums or canisters to
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refuel the vehicle, you should filter the
fuel before filling.
* NOTE Damage due to incorrect fuel
Incorrect fuel can lead to engine damage.
Refuel only ULSD or diesel fuel with a
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sulfur content of maximum 15 ppm.
Usually you will find information about the fuel
grade on the fuel pump. If there is no identifica‐
tion on the fuel pump, consult a gas station
attendant.
The fuel grade recommended for your vehicle is
found on the instruction label in the fuel filler
flap .
Notes on low outside temperatures
& WARNING Risk of fire and explosion due
to fuel igniting
If you heat fuel system components, e.g. with
a heat gun or open flame, these components
could be damaged.
Fuel may leak out and ignite. Depending on
the type of damage, fuel might not escape
until the engine is running.
Never heat fuel system components.
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Consult a qualified specialist workshop
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to have the malfunction rectified.
Refill only with commercially available ULTRA-
LOW SULFUR DIESEL (ULSD, maximum sulfur
content 15 ppm), which fulfills the ASTM D975
standard.
The flow properties of diesel fuel may be inade‐
quate at low outside temperatures due to paraffin
separation.
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Malfunctions resulting from paraffin separa‐
tion can only be rectified by heating the
entire fuel system. Park the vehicle in a
heated garage, for example.
To prevent malfunctions, diesel fuel with
improved flow characteristics is available in the
winter months. You can obtain further informa‐
tion on this at the gas station or from your fuel
supplier.
Your vehicle is equipped with a fuel preheating
system. This additionally improves the flow char‐
acteristics of the diesel fuel by about 14.5 °F
(8 °C). ULTRA-LOW SULFUR DIESEL can be used
without risk of malfunction down to an outside
temperature of approximately 14.5 °F (-10 °C).
* NOTE Damage due to gasoline or paraffin
Gasoline or paraffin in diesel fuel impairs the
lubricity of the fuel. This can result in damage
to the fuel injection system, for example.
Do not add any gasoline or paraffin to
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diesel fuel to improve its flow character‐
istics.
B20 fuels with bio-diesel content
* NOTE Damage due to incorrect fuel
Continuous use of fuels with bio-diesel con‐
tent over 5% (B20 fuels) can lead to fuel filter
clogging. Deposits may also form on the fuel
injector. This may reduce the engine output.
Unburned fuel can get into the oil pan. This
causes the engine oil level to rise. This can
cause engine mechanical damage.
Observe the following points to avoid damage
and reducing the engine output:
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