If you use diesel with a high sulphur con-
tent, the servic
e intervals are shorter. Suita-
bly qualified workshops can provide infor-
mation on countries that use diesel with
a high sulphur content.
The fuel quality aects the running proper-
ties, performance and service life of the en-
gine. Refuel with fuel that already contains
suitable additives →
.
W
inter-grade diesel fuel and lter 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 oered at fill-
ing stations during the winter season.
There may be dierent 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 dama
ge.
·
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
ma
y occur in the diesel engine and the
exhaust gas may be tinged blue.
Refuelling
Fig. 163 On the le-hand side of the vehicle:
tank flap with open tank c
ap.
284 Fuel and emission control
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