
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

X
Turn tank filler cap 0006counter-clockwise,
remove it and let it hang from strap 0005.
Make sure that tool 0023remains in tank filler
cap 0006while doing so.
X Only fill up the DEFt ank until the DEFlevel
is visible for the first time in the filler neck.
X Replace tank filler cap 0006and turn
clockwise.
X Pull tool 0023out of tank filler cap 0006and
stow with the vehicle tool kit in the footwell
on the co-driver's side.
X Pull cover 0025up over hole 0026of tank filler
cap 0006, turn and release.
X Turn tank filler cap 0006.
If tank filler cap 0006turns freely, the DEF
tank is closed. Parking
Important safety notes
G
WARNING
Flammable materials, e.g. leaves, grass or
twigs, may ignite if they come into contact
with hot parts of the exhaust system or
exhaust gases for extended periods. There is
a risk of fire.
Park the vehicle so that no flammable
materials come into contact with hot parts of
the vehicle. In particular, do not park on dry
areas of grass or harvested grainfields. G
WARNING
If you switch off the ignition while driving,
safety-relevant function sare only available
with limitations, or not at all.T his could affect,
for example, the power steering and the brake
boosting effect.Y ou will require considerably
more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving. G
WARNING
If you leave children unsupervised in the
vehicle, they could set it in motion by, for
example:
R releasing the parking brake
R shifting the automatic transmission out of
the parking position P
R starting the engine.
They could also operate the vehicle's
equipment. There is a risk of an accident and
injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
! Am oving vehicle can lead to damage to
the vehicle or damage to the drive train.
! When the vehicle is parked, always
remove the key to prevent the battery from
becoming discharged.
On vehicles with a battery isolating switch,
switch off the power supply if the vehicle is
to be out of use for a longer period of time.
Always park your vehicle safely and according
to legal requirements and secure it against
rolling away.
To ensure that the vehicle is properly secured
against rolling away unintentionally:
R the parking brake must be firmly applied
R the selector lever must be in position Pand
the key must be removed from the ignition
lock
R
R on steep uphill or downhill gradients, the
front wheels must be turned towards the
curb
R on steep uphill or downhill gradients, the
empty vehicle must be secured at the front
axle, e.g. with a wheel chock or similar
object
R on steep uphill or downhill gradients, the
laden vehicle must also be secured at the
rear axle, e.g. with a wheel chock or similar
object Parking
145Driving and parking Z

Use the wheel chock (Y
page 147) to do so.Parking brake
G
WARNING
If you leave children unsupervised in the
vehicle, they could set it in motion by, for
example:
R releasing the parking brake
R shifting the automatic transmission out of
the parking position P
R starting the engine.
They could also operate the vehicle's
equipment. There is a risk of an accident and
injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle. G
WARNING
If you must brake the vehicle with the parking
brake, the braking distance is considerably
longer and the wheels could lock. There is an
increased danger of skidding and accidents.
Only use the parking brake to brake the
vehicle when the service brake is faulty. Do
not apply the parking brake too firmly. If the
wheels lock, release the parking brake until
the wheels begin turning again. The brake lamps are not illuminated when you
brake the vehicle using the parking brake.
As a rule, you may only apply the parking
brake when the vehicle is stationary. X
To apply the parking brake: pull brake
lever 0005up as far as the last possible
detent.
The 000B warning lamp in the instrument
cluster lights up if the engine is running.
i On vehicles with a folding brake lever, you
can then press lever 0005down to the stop.
X To release the parking brake: on vehicles
with a folding brake lever, first pull brake
lever 0005up to the stop.
X Raise brake lever 0005slightly and press
release knob 0006.
X Guide brake lever 0005down to the stop.
The 000B indicator lamp in the instrument
cluster goes out.
Exceptionally, if the service brake fails, the
parking brake can be used to brake the
vehicle in an emergency.
X Emergency braking: press and hold
release button 0006and carefully apply brake
lever 0005. Switching off the engine
G
WARNING
The automatic transmission switches to
neutral position Nwhen you switch off the
engine. The vehicle may roll away. There is a
risk of an accident.
After switching off the engine, always switch
to parking position P. Prevent the parked
vehicle from rolling away by applying the
parking brake.
! If the coolant temperature is very high,
e.g. after driving on hilly roads, leave the
engine running at idle speed for about
two minutes before turning it off.
This allows the coolant temperature to
return to normal.
X Stop the vehicle.
X Shift the automatic transmission to
position P. 146
ParkingDriving and parking

X
Apply the parking brake.
X Turn the key to position 0in the ignition
lock and remove it.
The immobilize ris activated.
X Secure the vehicle to prevent it from rolling
away (Y page 145). Wheel chock
Use the wheel chock or asimilar object to
prevent the vehicle fro mrolling away, e.g.
when parking or changing awheel. Wheel chock in the load/passenger compartment
X To remove the wheel chock on Cargo
Vans/Passenger Vans: pull restraining
cable 0005down a little and remove it from
retainer 0006.
X Remove the chock.
i When stowing the wheel chock, make
sure that restraining cable 0005is holding it
securely in retainer 0006. Wheel chock to the rear of the chassis on the left
side of the vehicle X
To remove the wheel chock on Chassis
Cabs: pull the locking springs down and
remove the wheel chock.
i When stowing the wheel chock, make
sure that it is secured in the retainer with
the locking springs. Parking the vehicle for
along period
If you leave the vehicle parked for longer than
4w eeks, the battery may be damaged by
exhaustive discharging.
X Disconnect the batter y(Ypage 251) or
switch off the battery main switch
(Y page 132).
Or
X Connect the battery to a trickle charger.
You can obtain information about trickle
chargers from a qualified specialist
workshop.
If you leave the vehicle parked for longer than
6w eeks, the vehicle may suffer damage as a
result of lack of use.
X Visit a qualified specialist workshop and
seek advice. Driving tips
General notes
Important safety notes G
WARNING
The driver's attention to the road must always
be his/her primary focus when driving. For
your safety and the safety of others, we
recommend that you pull over to a safe
location and stop before placing or taking a
telephone call. If you choose to use the
telephone while driving, please use the hands-
free device and only use the telephone when
road, weather and traffic conditions permit.
Some jurisdictions prohibit the driver from
using a mobile phone while driving a vehicle. Driving tips
147Driving and parking
Z

Limited braking performance on salt-
treated roads When driving on salted roads, salt may start
to build up on the brak edisks and brake pads.
This can increase braking distances
considerably.
Maintain a greater distanc eto the vehicle in
front.
To remove any build up of salt that may have
formed:
X Apply the brakes at the start of the journey,
occasionally during journey and at the end
of the journey. Make sure that you do not
endanger other road users when doing so.
Parking brake G
WARNING
If you must brake the vehicle with the parking
brake, the braking distance is considerably
longer and the wheels could lock. There is an
increased danger of skidding and accidents.
Only use the parking brake to brake the
vehicle when the service brake is faulty. Do
not apply the parking brake too firmly. If the
wheels lock, release the parking brake until
the wheels begin turning again.
When driving on wet roads or dirt-covered
surfaces, road salt and/or dirt may get into
the parking brake. This causes corrosion and
a reduction of braking force.
In order to prevent this, drive with the parking
brake lightly applied from time to time. When
doing so, drive for a distance of approximately
110 yds (100 m) at a maximum speed of
12 mph (20 km/h).
The brake lamps are not illuminated when you
brake the vehicle using the parking brake. Driving in wet conditions
Hydroplaning G
WARNING
There is a danger of hydroplaning occurring,
even if you are driving slowly and your tires
have sufficient tread depth, depending on the
depth of water on the road. There is a risk of
an accident.
For this reason, avoid tire ruts and brake
carefully.
Therefore, in heavy rain or other conditions in
which hydroplaning can occur, drive as
follows:
R reduce your speed
R avoid tire ruts
R apply the brakes with care
Driving on flooded roads !
Do not drive through flooded areas.
Check the depth of any water before driving
through it. Drive slowly through standing
water. Otherwise, water may enter the
vehicle interior or the engine compartment.
This can damage the electronic
components in the engine or the automatic
transmission. Water can also be drawn in
by the engine's air suction nozzles and this
can cause engine damage.
If you have to drive on stretches of road on
which water has collected, please bear in
mind that:
R the water level of standing water should not
be above the lower edge of the front
bumper
R do not drive faster than walking speed Driving tips
151Driving and parking Z

Driving in winter
General notes G
WARNING
If you shift down on a slippery road surface in
an attempt to increase the engine's braking
effect, the drive wheels could lose their grip.
There is an increased danger of skidding and
accidents.
Do no tshift down for additional engine
braking on a slippery road surface. G
DANGER
If the exhaust pipe is blocked or adequate
ventilation is not possible, poisonous gases
such as carbon monoxide (CO) may enter the
vehicle. This is the case, e.g. if the vehicle
becomes trapped in snow. There is a risk of
fatal injury.
If you leave the engine or the auxiliary heating
running, make sure the exhaust pipe and area
around the vehicle are clear of snow. To
ensure an adequate supply of fresh air, open
a window on the side of the vehicle that is not
facing into the wind.
Have your vehicle winterproofed at a qualified
specialist workshop in good time at the onset
of winter.
i Do not cover the radiator, e.g. with a
winter cover. The measurements of the on-
board diagnostic system may otherwise
return inaccurate values. Some of these
values are legally prescribed and must
therefore always be exact.
Observe the notes in the "Winter operation"
section (Y page 276).
Driving with summer tires Observe the notes in the "Winter operation"
section (Y page 276). Slippery road surfaces G
WARNING
If you shift down on a slippery road surface in
an attempt to increase the engine's braking
effect, the drive wheels could lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine
braking on a slippery road surface. G
WARNING
The outside temperature indicator is not
designed to serve as an ice-warning device
and is therefore unsuitable for that purpose.
Indicated temperatures just above the
freezing point do not guarantee that the road
surface is free of ice. The road may still be icy,
especially in wooded areas or on bridges.
! Vehicles with automatic transmission
may roll only briefly in the neutral position
N.P rolonged rolling of the wheels, e.g.
when being towed, will result in
transmission damage.
If the vehicle threatens to skid or cannot be
stopped when moving at low speed:
X Shift the transmission to neutral position
N.
X Try to maintai ncontrol of the vehicle using
corrective steering.
Drive particularly carefully on slippery roads.
Avoid sudden acceleration, steering and
braking maneuvers. Do not use cruise
control.
You can find further information on winter
tires and snow chains in the "Wheels and
tires" section (Y page 276).152
Driving tipsDriving and parking

Deactivating cruise control
There are various ways to deactivate cruise
control:
X Briefly press the cruise control lever
forwards 0025.
Or
X Apply the brakes.
The last speed set remains stored. The last
speed stored is deleted when you switch off
the engine.
Cruise control is deactivated automatically
when:
R you apply the brakes
R you apply the parking brake and the 000B
indicator lamp in the instrument cluster
lights up
R you are driving slower than 20 mph
(30 km/h)
R you shift the automatic transmissio nto
neutral position Nwhile the vehicle is in
motion
R ESP ®
or ASR intervenes
R there is a malfunction in the ESP ®
, ASR or
ABS system
Problems with cruise control On vehicles with steering wheel buttons, the
speed canno
tbe set when cruise control is
activated.
The display is showing a message of high
priority and cannot therefore show a change
in speed.
X Proceed as instructed by the message in
the display.
X Deactivate cruise control PARKTRONIC
Important safety notes PARKTRONIC is only an aid. It cannot replace
your own awareness of the immediate
surroundings. You are responsible for safe maneuvering, parking and pulling away. When
maneuvering, parking and pulling away, make
sure that there are no persons, animals or
objects in the maneuverin
garea.
PARKTRONIC does not account for obstacles
that are:
R beneath its detection range, e.g. persons,
animals or objects
R above its detection range, e.g. overhanging
loads, overhangs or truck loading ramps
PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It indicates the distance
between yourv ehicle and an objec tvisually
and audibly.
Your vehicle features two separate sound
emitters with different frequencies for the
warning tones. The warning ranges in front of
and behind the vehicle are indicated by
different warning tones.
PARKTRONIC is activated automatically when
you:
R tur nthe key to position 2in the ignition lock
R release the parking brake and
R move the selector lever to D,Nor R.
PARKTRONIC is deactivated at speeds above
11 mph (18 km/h). PARKTRONIC is
reactivated at speeds below 10 mph
(16 km/h).
PARKTRONIC monitors the area around your
vehicle with sensors in the front and rear
bumpers.
Range of the sensors !
Pay particular attention to obstacles
above or below the sensors when parking,
such as flower pots or trailer towbars.
PARKTRONIC does not recognize such
objects when they are in the immediate
vicinity of the vehicle. You could damage
the vehicle or objects. Driving systems
157Driving and parking Z

Problems with PARKTRONIC
Problem Possible causes/consequences and
0004 Solutions
Only the red segments
in the PARKTRONIC
warning displays are lit.
Aw
arning tone also
sounds for
approximately
2s econds.
PARKTRONIC is
deactivated after
approximately
20 seconds.
The indicator lamp of
the 000C button lights
up and the red
segments in the
PARKTRONIC warning
display go out. PARKTRONIC has malfunctioned and has switched itself off.
X
If problems persist, have PARKTRONIC checked at a qualified
specialist workshop. The PARKTRONIC
warning displays
implausible distances.
For example, all the
segments may be lit
even though there is no
obstacle present. The PARKTRONIC sensors are dirty or iced up.
X
Clean the PARKTRONIC sensors (Y page 259).
X Turn the key to position 2again in the ignition lock. The license plate or other parts attached near the sensors may
not be secured correctly.
X
Check the license plate and attachment parts near the sensors
for correct seating. An external radio or ultrasonic source may be causing
interference.
X
Check PARKTRONIC functions in a different location. Rear view camera
Important safety notes !
Objects that are not at ground level
appear further away than they actually are,
for example:
R the bumper of the vehicle parked behind
R the drawbar of a trailer
R the ball coupling of a trailer tow hitch R
the tail-end of a truck
R slanted posts
Only use the camera guide lines for
orientation. Do not get any closer to
objects than the lowest horizontal guide
line. You may otherwise damage your
vehicle and/or the object.
The rear view camera is only an aid. It cannot
replace your own awareness of the
immediate surroundings. You are responsible Driving systems
161Driving and parking Z