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If you use diesel with a high sulphur con-
tent, the service intervals are shorter. Suita-
bly
qualified
workshops can provide infor-
mation on countries that use diesel with
a high sulphur content.
The fuel quality
affects
the running proper-
ties, performance and service life of the en-
gine. Refuel with fuel that already contains
suitable additives
→
.
Winter-grade diesel fuel and filter pre-
heater system
During the winter season, you have to use
diesel with improved
flow
characteristics
under cold conditions (winter diesel). You
can avoid operational faults by refuelling
winter diesel. Winter diesel is
offered
at
fill-
ing
stations during the winter season.
There may be
different
classes of cold de-
pending on the climate and time in the na-
tional fuel standards.
Diesel vehicles are equipped with a
filter
preheater system. The cold
flow
character-
istic of the diesel is ensured while driving by
the
filter
pre-heating function. Information
on the cold properties of diesel is provided
by the
filling
stations in the respective
country and correspondingly
qualified
workshops.
In order to ensure that the vehicle can also
be started at low outside temperatures, it is
recommended to park the vehicle in a loca-
tion that is sheltered from the weather,
e.g. in a garage.
Misfuelling prevention device
The tank
filler
neck in diesel vehicles may
be
fitted
with a misfuelling prevention de-
vice. This is intended to help ensure that
the vehicle is refuelled only using diesel
fill-
er
nozzles.
If you are unable to insert the fuel nozzle in-
to the tank
filler
neck properly,
first
check
whether you are using a diesel pump noz-
zle. Once you have ascertained that you are
using the correct
filler
nozzle, turn the die-
sel
filler
nozzle back and forth while apply-
ing light pressure. This can open the misfu-
elling prevention device and make it possi-
ble to refuel the vehicle. If the misfuelling
prevention device is still closed, contact an
authorised workshop and have the system
checked.
The misfuelling prevention device may not
open if you have to refuel the vehicle using
a spare fuel canister in an emergency.
In order to still
fill
the tank with fuel, pour
the
diesel
into the tank extremely slowly in
very small quantities. Use a suitable adapt-
er for the spare fuel canister to make refu-
elling easier. The relevant adapters are
available from a suitably
qualified
work-
shop.
WARNING
Incorrect refuelling can lead to
fire,
seri-
ous injuries and vehicle damage.
·
Before refuelling, check whether the
fuel standard
specified
on the pump
meets the vehicle’s requirements.
·
Do not refuel with pure RME fuel, petrol,
fuel oil or other unsuitable fuels.
·
Use only additives that have been ap-
proved by the manufacturer in the ap-
proved quantity.
At cold temperatures, louder noises
may occur in the diesel engine and the
exhaust gas may be tinged blue.
Refuelling
Fig. 163
On the
left-hand
side of the vehicle:
tank
flap
with open tank cap.
284
Fuel and emission control
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