Page 146 of 334

i
If you switch off the engine at a low
outside temperature and add DEF, restart
the engine after refueling. If you leave the
vehicle parked withou trestarting the
engin eand the DEF freeze sin the DEF tank,
the on-board compute rwill only be able to
register the new fill level after a defrosting
period of up to 60 minutes. During this
time, you may not be able to start the
engine.
You will find further information on DE Finthe
"Service products" section (Y page 317).
Refueling procedure DEF filler neck in the engine compartment
X
Remove the key from the ignition lock.
X Switch off the auxiliary heating system
(Y page 125).
X Open the hood.
X Close all vehicle doors so that no ammonia
vapors can enter the vehicle.
i Do not inhale any ammonia vapor which
may escape when you unscrew cap 0005.
Ammonia vapors have a pungent odor.
However, they are neither toxic nor
hazardous to health in this concentration.
X Turn cap 0005counter-clockwise and remove
it.
X Only fill up the DEF tank until the DEF level
is visible in the filler neck.
X Replace DEF filler neck cap 0005on the filler
neck and turn clockwise. You will hear a click when cap
0005is fully
closed.
DEF filler neck on the right-hand vehicle
side The DEF reservoir on the right-hand side of the
vehicle (example: Chassis Cab)
Fuel filler cap
X
Remove the key from the ignition lock.
X Switch off the auxiliary heating system
(Y page 125).
X Remove tool 0023for unlocking tank filler
cap 0006from the footwell on the co-driver's
side (Y page 264).
X Close all vehicle doors so that no ammonia
vapors can enter the vehicle.
X Pull cover 0025up, turn 90° and release.
X Insert tool 0023into hole 0026of tank filler
cap 0006.
i Do not inhale any ammonia vapor that
may escape when you unscrew tank filler
cap 0006.A mmonia vapors have apungent
odor .However, they are neither toxic nor
hazardous to health in this concentration. 144
RefuelingDriving and parking
Page 266 of 334

Useful information
This Operator's Manual describes all models
as well as standard and optional equipment
of your vehicle that were available at the time
of going to print. Country-specific variations
are possible. Note that your vehicle may not
be equipped with all of the described
functions. This also applies to systems and
functions relevant to safety.
Read the information on qualified specialist
workshops (Y page 26). Where will I find...?
Vehicle tool kit
General notes The vehicle tool kit is in the stowage
compartment in the footwell on the co-
driver's side. For vehicles without a spare
wheel, the Premium tire sealant and the tire
inflation compressor are in the stowage
compartment in the right-hand door sill.
The vehicle tool kit consists of:
R a towing eye
R a lug wrench
R 2o pen-end wrenches
R a screwdriver with Torx ,Phillips and slotted
bits
i Vehicles without a spare wheel are not
equipped with the tools needed to change
a wheel when they leave the factory, e.g. a
jack. In the event of a flat tire, these
vehicles are equipped with a tire sealant
and a tire inflation compressor. Country-
specific variations are possible. Stowage compartment in the co-
driver's footwell Unlocking and removing the cover
X
Turn quick-release fastener 0005counter-
clockwise or clockwise 0009.
X Slightly raise and pull out the cover. Removing the vehicle tool kit and the jack
X
If necessary, use tool 4
0026 for the DEF tank
fuel filler cap to remove the fixture.
X Remove vehicle tool kit 0024.
X Pull up quick-release lever 0025and unhook
the retaining strap of jack 0023.
X Lift jack 0023upwards out of the holder.
i When stowing away the jack, place it in
the holder as shown in the illustration.
Make sure that the retaining strap of the
jack is hooked in and tensioned.
4 Chassis Cab only. 264
Where will I find...?Breakdown assistance
Page 283 of 334

X
Read the tire pressure and compare it with
the recommended value on the loading
information table or th etire pressure table
(Y page 278).
X If the tire pressure is too low, increase it to
the recommended value.
X If the tire pressure is too high, release air
by pressing down the metal pin in the valve.
Use the tip of a pen, for example. Then,
chec kthe tire pressure again using the tire
pressure gauge.
X Screw the valve cap onto the valve.
X Repeatt he steps for the other tires. Tire pressure monitor
Important safety notes G
WARNING
Each tire, including the spare (if provided),
should be checked at least once a month
when cold and inflated to the pressure
recommended by the vehicle manufacturer
on the Tire and Loading Information placard
on the driver's door B-pillar or the tire
pressure label on the inside of the fuel filler
flap. If your vehicle has tires of a different size
than the size indicated on the Tire and Loading
Information placard or the tire pressure label,
you should determine the proper tire pressure
for those tires.
As an added safety feature, your vehicle has
been equipped with a tire pressure monitoring
system (TPMS) that illuminates a low tire
pressure telltale when one or more of your
tires are significantly underinflated.
Accordingly, when the low tire pressure
telltale illuminates, you should stop and check
your tires as soon as possible, and inflate
them to the proper pressure. Driving on a
significantly underinflated tire causes the tire
to overheat and can lead to tire failure.
Underinflation also reduces fuel efficiency
and tire tread life, and may affect the vehicle's
handling and stopping ability. Please note that the TPMS is not a substitute
for proper tire maintenance, and it is the
driver's responsibility to maintain correct tire
pressure, even if underinflation has not
reached the level to trigger illumination of the
TPMS low tire pressure telltale.
USA only:
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate if the
system is not operating properly. The TPMS
malfunction indicator is combined with the
low tire pressure telltale. When the system
detects a malfunction, the warning lamp will
flash for approximately a minute and then
remain continuously illuminated. This
sequence will be repeated every time the
vehicle is started as long as the malfunction
exists.
When the malfunction indicator is illuminated,
the system may not be able to detect or signal
low tire pressure as intended. TPMS
malfunctions may occur for a variety of
reasons, including the installation of
incompatible replacement or alternate tires
or wheels on the vehicle that prevent the
TPMS from functioning properly. Always
check the TPMS malfunction telltale after
replacing one or more tires or wheels on your
vehicle to ensure that the replacement or
alternate tires and wheels allow the TPMS to
continue to function properly.
Vehicles with a tire pressure monitor are
equipped with sensors in the wheels that
monitor the tire pressure of all four tires. The
tire pressure monitor monitors the pressure
in all four tires; you set this pressure when
you activate the tire pressure monitor. The
tire pressure monitor warns you when the
pressure drops in one or more of the tires. The
tire pressure monitor only functions if the
corresponding sensors are installed to all
wheels.
You should always adjust the tire pressure
according to the vehicle load. Restart the tire
pressure monitor if you change the tire
pressure. Tire pressure
281Wheels and tires Z