Fuel additives can result in:
R
Malfunctions
R
Damage to the catalytic converter
R
Engine damage
H
Environmental note
If fuels are handled improperly, they pose a
danger to persons and the environment. Do
not allow fuels to run into the sewage sys-
tem, the surface waters, the ground water or
into the ground.
!
Use truck fuel pump nozzles to refuel. If
you use a passenger vehicle fuel pump noz-
zle, the flap in the filler neck could be dam-
aged.
If you have to use a passenger vehicle fuel
pump nozzle, insert it into the filler neck so
that only one of the pump nozzle lugs rest
on the edge of the filler neck.
If a passenger vehicle fuel pump nozzle is
inserted too far, this may result in a lug get-
ting caught on the flap in the filler neck. To
release the fuel pump nozzle in such a case,
twist or tip it before attempting to remove
the fuel pump nozzle.
You will find further information on fuel in the
"Service products" section (
Y
page 202).
Before filling the tank
!
Filter the fuel before transferring it to the
vehicle if you are refueling the vehicle from
barrels or containers.
This will prevent malfunctions in the fuel
system due to contaminated fuel.
Example: fuel tank
:
Cap
;
Fuel tank
X
Switch off the engine.
X
Apply the parking brake.
X
Switch off the auxiliary heating system
(
Y
page 63).
X
Remove the key from the ignition lock.
X
Observe the fuel grade (
Y
page 202).
i
Regularly check the fuel prefilter with
heated water separator for condensation
(
Y
page 176).
Diesel Exhaust Fluid (DEF)
Important safety notes
!
Make sure that diesel fuel does not get
into the DEF tank. Otherwise, you could
damage the emissions control system.
!
Only use DEF in accordance with
DIN 70070/ISO 22241. Do not use any
additives.
If DEF comes into contact with painted or
aluminum surfaces when filling the tank,
rinse the affected area immediately with
plenty of water.
!
Do not mix any additives with DEF. Do not
dilute DEF with tap water. This could result
in malfunctioning of the emissions control
system.
!
Always close the DEF tank correctly.
Impurities could otherwise get into the
emissions control system and damage it.
!
Make sure that you do not overfill the DEF
tank. Otherwise, the DEF tank could be
damaged at very low temperatures.
When opening the DEF tank, small amounts of
ammonia vapors can escape.
Ammonia vapors have a pungent smell and are
particularly irritating to:
R
Skin
R
Mucous membranes
R
Eyes
The vapors may cause a burning sensation in
the eyes, nose and throat as well as irritation
of the throat and watering eyes.
Avoid inhaling ammonia vapors. Only fill the
DEF tank in well-ventilated areas.
152
Refueling
Dri
vin
gm
ode
