The auxiliary heating works independently of
the engine and supplements the climate
control system in the vehicle. The auxiliary
heating heats the air in the vehicle interior to
the temperature set.
If your vehicle is equipped with a hot-water
auxiliary heater, the auxiliary heating also
keeps the coolant warm. This way, the load
on the engine is minimized and fuel is saved.
The heater booster function of the auxiliary
heating supports the climate control system
when the engine is runnin gand the outside
temperature is low.
You can use the auxiliary heating at an
outside temperature of up to 39 ‡ (4 †). At
an outside temperature above 39 ‡(4† ) the
auxiliary heating system and the heater
booster function switch off automatically.
i If the interior motion sensor (Y page 61)
is armed and the auxiliary heating is
switched on, it is possible that the interior
temperature monitoring may cause a false
alarm. In this case, either deactivate the
interior motion sensor or switch off the
auxiliary heating. Before switching on
X Check the fuel level and top up if necessary.
The auxiliary heating is operated directly
using the vehicle's fuel. The tan kmust be
at least a quarter full to ensure that the
auxiliary heating functions.
X Switch on climate control (Y page 112).
X Se tthe temperature control to the desired
temperature (Y page 113).
X Set the air distribution as required
(Y page 113).
X Open the center (Y page 117) and side air
vents (Y page 117) and set them to the
middle position.
i The auxiliary heating automatically
switches to heater booster mode after the
engine is started. Operating with the button (control
panel)
i
Switch the heater booster function on or
off with the 0013button (Y page 125).
X To activate the auxiliary heating
system: press the upper section of the
0020 switch for longer than two seconds.
The red indicator lamp in the button lights
up. The auxiliary heating heats or ventilates
the interior to the temperature that you
have set. The blower switches to the first
level.
X To switch off auxiliary heating: press the
upper section of the 0020button.
Or
X Turn the key in the ignition lock to
position 0.
The red indicator lamp in the button goes
out. The auxiliary heating operates for
another two minutes and then switches off
automatically. Selecting
aswitch-on time
Important information You can use the on-boar
dcomputer to define
up to three switch-on times, one of which can
be selected.
The yellow indicator lamp in the 0020button
goes out after 30 minutes, if you:
R have selected the switch-on time and
R turn the key to position 0in the ignition
lock. Operating the auxiliary heating system
119Climate control Z
On-board computer without steering
wheel buttons
X
Turn the key to position 2in the ignition
lock.
X Press the 0020button.
The 0020 symbol flashes in the display.
Or
X Press the 0004menu button on the
instrument cluster repeatedly until the
0020 symbol flashes in the display.
X Use the 000Eor000F buttons on the instrument
cluster to select the switch-on time 1 to
3 .
The switch-on time selected is displayed.
X Wait 10 seconds for the standard display to
appear.
The switch-on time is selected. The yellow
indicator lamp in the 0020button lights up.
If you do not preselect a switch-on time,
and --:-- is shown in the display, this
means that the automatic switch-on mode
is switched off. The yellow indicator lamp
in the 0020button goes out.
On-boar dcomputer with steering wheel
buttons X
Turn the key to position 2in the ignition
lock.
X Press the 0020button.
The Aux. heat submenu is shown in the
display.
If no switch-on time has been selected, the
selected switch-on time is highlighted or
Timer off is highlighted.
i You can also access the Aux. heat.submenu via the
Settings (Y
page 183)
menu. X
Use the 0011or0012 button on the
steering wheel to selec tthe desired switch-
on time.
Use the Timer off setting to deactivate
automatic switch-on.
X Press the 0010button on the steering
wheel.
The switch-on time is selected. The yellow
indicator lamp in the 0020button lights up. Setting the switch-on time
X Use the same method to select a switch-on
time as described in the "Preselecting a
switch-on time" section.
On-board computer without steering
wheel buttons
X Press the 0007reset button on the
instrument cluster.
The hour display flashes.
X Use the 000Eand 000Fbuttons on the
instrument cluster to set the hours.
X Press reset button 0007.
The minute display flashes.
X Use the 000Eand 000Fbuttons to set the
minutes.
The switch-on time is set and selected.
On-board computer with steering wheel
buttons
X Press the 0001button on the steering
wheel.
The display shows the Hours menu.
X Use the 0011and0012 buttons on the
steering wheel to set the hours.
X Press the 0001button.
The display shows the Minutes menu.
X Use the 0011and0012 buttons to set the
minutes.
X Press the 0010button.
The switch-on time is set and selected. 120
Operating the auxiliary heating systemClimate control
Problem Possible causes/consequences and
0004 Solutions
The auxiliary heating
switches off
automatically and/or
cannot be switched on. The low-voltage protection system integrated in the control unit
switches off the auxiliary heating because the on-board voltage is
less than 10 V.
X Have the alternator and battery checked. The auxiliary heating
switches off
automatically and/or
cannot be switched on. The fuse is blown.
X
Replace the fuse; see the "Fuse allocation" supplement.
X Have the cause of the blown fuse determined at a qualified
specialist workshop. The auxiliary heating
switches off
automatically and/or
cannot be switched on. A malfunction has occurred.
X
Switch the ignition on and off twice.
If the auxiliary heating still cannot be switched on, the heating
device is faulty.
X Have the auxiliary heating checked at a qualified specialist
workshop. The auxiliary heating is
overheated. The coolant level is too low.
X
Check the coolant level and add more coolant if necessary
(Y page 244). Operating the cargo compartment air
vents
If your vehicle is equipped with a roof
ventilator, you can ventilate and extract air
from the cargo compartment. X
Turn the key to position 2in the ignition
lock.
X To activate and extract air: press the
upper section of the 0009switch.
The roof ventilator removes used air from
the cargo compartment.
X To activate and ventilate: press the lower
section of the 0010switch.
The roof ventilator feeds fresh air into the
cargo compartment.
X To switch off: set the switch to the middle
position. Operating the cargo compartment air vents
129Climate control Z
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). Breaking-in notes
The first 1,000 miles (1,500 km)
New or replaced brake pads and brake disks
only reach their optimum braking effec tafter
100 miles (a few hundred kilometers). Until
then, compensate for this by applying greater
force to the brake pedal.
For the service life and economy of your
vehicle it is crucial that you brea kinthe
engine with due care.
R Therefore, protect the engine for the first
1,000 miles (1,500 km) by driving at
varying vehicle and engine speeds.
R Avoid overstraining the vehicle and high
engine speeds during this period, e.g.
driving at full throttle. Do not exceed 0001of
the maximum speed for each gear.
R Do not change down a gear manually in
order to brake.
R Try to avoid depressing the accelerator
pedal beyond the point of resistance
(kickdown).
R The shift ranges 3,2or 1should only be
engaged when driving slowly, e.g. when
driving in mountainous terrain.
After 1,000 miles (1,500 km), you can
increase the engine speed gradually and
accelerate the vehicle up to full speed.
i You should also observe these notes on
breaking-in if the engine or parts of the drive train on your vehicle have been
replaced. Driving
Important safety notes
G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This 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 the parking brake has not been fully
released when driving, the parking brake can:
R overheat and cause a fire
R lose its hold function.
There is a risk of fire and an accident .Release
the parking brake fully before driving off. Battery isolating switch
Important safety notes !
Make sure that the key is in position 0in
the ignition lock and wait at least
20 seconds before disconnecting or
connecting the battery isolating switch.
You could otherwise damage electrical
system components.
You can use the battery isolating switch to
disconnect the power supply to all your
vehicle's consumers. This will prevent
uncontrolled battery discharge caused by off-
load curren tconsumption.
If your vehicle is equipped with an auxiliary
battery in the engine compartment, you will
need to disconnect both batteries. Only then
is the electrical system fully disconnected
from the power supply. 132
DrivingDriving and parking
i
Only switch the vehicle to de-energized
using the battery main switch if:
R the vehicle is stationary for a lengthy
period
R it is absolutely necessary
After the power supply has been activated,
you will need to reset the side windows
(Y page 77).
Switching off the power supply !
When you clamp the connector under the
accelerator pedal, make sure that the
connector does not become damaged or
dirty. It may otherwise not be possible to
restore the electrical connection when the
parts are reassembled. Battery isolating switch in the driver's footwell, on
the right-hand side next to the accelerator pedal
X Remove the key from the ignition lock and
waitf or about 20 seconds.
X Press and hold button 0006and unplug
connector 0005from the earth pin.
X Clamp connector 0005under the accelerator
pedal so that it cannot make contact with
the earth pin.
All starter battery consumers are
disconnected from the power supply. Switching on the power supply X
Insert the key into the ignition lock.
X Press connector 0005onto earth pin 0006until
you feel it engage and the lock inhibitor is
released.
Connector 0005must be in full contact with
earth pin 0006.
All consumers are reconnected to the DC
power supply. Key positions
0011
To insert/remove the key, to lock the
steering wheel
0008 To unlock the steering wheel, power
supply for some consumers (e.g. the
radio)
0009 To switch on the ignition, power supply for
all consumers, preglow and drive position
000A To start the engine
On vehicles with a battery main switch, you
must first switch on the power supply
(Y page 132). Driving
133Driving and parking Z
i
To unlock the steering, move the steering
wheel slightly while turning the key to
position 1. Preparing for a journey
Visual check of the vehicle exterior X
In particular, check the following
components on the vehicle, and on the
trailer as necessary:
R
license plates, vehicle lighting, turn
signals, brake lamps and wiper blades for
dirt and damage
R tires and wheels for firm seating, correct
tire pressure and general condition
R trailer tow hitch for play and security
i The trailer coupling is one of the most
importan tvehicle parts with regard to road
safety. The separate instructions issued by
the manufacturer pertaining to operation,
care and maintenance should be observed.
X Rectify any noticeable defects before
commencing the journey.
Checks in the vehicle Emergency equipment/first-aid kit
X
Check the equipment to make sure that it
is accessible, complete and ready for use.
The first aid and breakdown assistance
equipment is in the fron tdoor stowage
compartments and behind the driver's seat.
Vehicle lighting
X Turn the key to position 2in the ignition
lock.
X Check the lighting system with the aid of a
second person.
X Replace defective bulbs (Y page 96). Before driving off
G
WARNING
Objects in the driver's footwell may restrict
the clearance around the pedals or block a
depressed pedal. This jeopardizes the
operating and road safety of the vehicle.
There is a risk of an accident.
Stow all objects securely in the vehicle so that
they do not get into the driver's footwell.
When using floormats or carpets, make sure
that they are properly secured so that they do
not slip or obstruct the pedals. Only use non-
slip floormats. G
WARNING
Unsuitable footwear can hinder correc tusage
of the pedals, e.g.:
R shoes with thick soles
R shoes with high heels
R slippers
There is a risk of an accident.
Wear suitable footwear to ensure correct
usage of the pedals.
X Secure the load as per the loading
guidelines (Y page 232).
X Make sure that the floormats and carpets
are properly secured so that they cannot
slip and obstruct the pedals.
X Close all doors. Starting the engine
G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is a risk of fatal injury. Therefore never leave
the engine running in enclosed spaces
without sufficient ventilation.
! Do not depress the accelerator pedal
when starting the engine.
X Before starting the engine, make sure that: 134
DrivingDriving and parking
R
all the doors are closed.
R all the vehicle occupants are wearing
their seat belts correctly.
R the parking brake is applied.
i If you depress the brake pedal before
starting the engine, th epedal travel is short
and pedal resistance is high.
If you depress the brake pedal again after
starting the engine, pedal travel and
resistance will be back to normal again. Gearshift pattern
0016
Park position with parking lock
0012 Reverse gear
0013 Neutral
0015 Drive
X Move the selector lever to position P.
The display in the instrument cluster shows
P:
R on vehicles with steering wheel buttons
(Y page 182)
R on vehicles without steering wheel
buttons (Y page 178)
i You can also start the engine in neutral
N.
X Turn the key to position 2in the ignition
lock.
The 000D preglow indicator lamp in the
instrument cluster lights up briefly.
X Once the 000Dpreglow indicator lamp goes
out, turn the key to position 3in the ignition
lock and release it as soon as the engine is
running. i
You can start the engine without preglow
when the engine is warm.
The preglow system is malfunctioning if the
000D preglow indicator lamp lights up for
approximately 1minute:
R after the ignition is switched on
R while the engine is running
At extremely low outside temperatures you
may the nno longer be able to start the
engine. Have the malfunction rectified at a
qualified specialist workshop.
i Depending on the equipment installed,
the vehicle either automatically locks
centrally after switching on the ignition or
after pulling away.T he locking knobs in the
doors drop down.
You can open the doors from the inside at
any time.
Automatic door locking can be deactivated
(Y page 69). Driving off
G
WARNING
If the engine speed is above the idling speed
and you engage transmission position Dor
R, the vehicle could pull away suddenly. There
is a risk of an accident.
When engaging transmission position Dor R,
always firmly depress the brake pedal and do
not simultaneously accelerate.
! Only shift into reverse gear Rwhen the
vehicle is stationary. Otherwise, you could
damage the transmission.
X Depress the brake pedal and keep it
depressed.
The selector lever lock is released.
X Move the selector lever to position Dor R.
On vehicles with a reverse warning feature,
when reverse gear is engaged a warning
tone sounds to alert other road users
(Y page 136). Driving
135Driving and parking Z
Problems with the engine
Problem Possible causes/consequences and
0004 Solutions
The engine does not
start.
The starter motor can
be heard. There is air in the fuel system.
X
Turn the key back to position 0in the ignition lock before
attempting to start the engine again.
X Start the engine again.
Please bear in mind that lengthy and frequent starting attempts
will drain the battery.
If the engine does not start after several attempts:
X Consult a qualified specialist workshop. The engine does not
start.
The starter motor can
be heard. The reserve
fuel warning lamp is lit
and the fuel gage is at
0. The fuel tank has been run dry.
X
Refuel the vehicle.
If you drive until the fuel tank is completely empty, air may get into
the fuel system. If the engine does not start after refueling, bleed
the fuel system as follows:
X Turn the key to position 2in the ignition for approximately
10 seconds.
X Start the engine continuously for a maximum of 60 seconds.
If the engine does not start:
X Wait approximately 2minutes.
X Start the engine continuously for a maximum of 60 seconds
again.
X If the engine still fails start, do not continue trying to start it.
X Consult a qualified specialist workshop. The engine does not
start.
The starter motor
cannot be heard. The
yellow
0018engine
diagnostic lamp and
the yellow 0009DEF
indicator lamp 1
light
up. The exhaust gas aftertreatmen
tis faulty, an emission-relevant
malfunction has occurred or the DEF reserve has been used up.
The engine management prevents the engine from starting.
This malfunction or defect can damage the exhaust gas
aftertreatment.
X Observe the messages in the display:
R on vehicles without steering-wheel buttons (Y page 195)
R on vehicles with steering-wheel buttons (Y page 204) and
(Y page 204). The engine does not
start.
The starter motor
cannot be heard. The battery isolating switch is switched off.
X
Switch on the power supply (Y page 132).1
Only vehicles without steering-wheel buttons. Driving
137Driving and parking Z