
Rear window defroster
Rear window defroste
rswitch
The rear window defroster consumes a lot of
power. You should therefore switch it off as
soon as the window is clear .The rear window
defroster otherwise switches off
automatically after 12 minutes.
X Start the engine.
X To switch on/off: press the0019switch.
The indicator lamp in the 0019button
comes on when the rear window defroster
is switched on.
If the indicator lamp in the 0019rear window
defroster button flashes, the on-board
voltage is too low. The rear window defroster
has switched off prematurely or cannot be
activated.
X Switch off any consumers that are not
required, e.g. reading lamps or interior
lighting.
If enough on-board voltage is available again
within 30 seconds, the rear window defroster
automatically switches on again. It otherwise
remains switched off. Switching air-recirculation mode on/
off
Important safety notes When you switch on air-recirculation mode,
the windows could fog up more quickly, in
particular at low outside temperatures. Only switch on air-recirculation mode for a short
time.
You can deactivate the intake of fresh air if
unpleasant odors enter the vehicle from
outside. The air inside the vehicle will only be
circulated.
Heating/air-conditioning system
Air-recirculation mode switches off
automatically after about 10to 30 minutes,
depending on the outside temperature.
X
Switch on climate control (Y page 112).
X To switch on/off: press the0022switch.
If the indicator lamp in the 0022button
lights up, air-recirculation mode is
activated.
Rear-compartment heating/rear-
compartment air conditioning On vehicles with a rear-compartment heating
and air-conditioning system, you can
activate/deactivate air-recirculation mode
for the rear-compartment climate control.
X Switch on climate control (Y page 112).
X To activate: set the temperature control of
rear-compartment heating
0026(Y page 111) or rear-compartment air
conditioning system 0006(Ypage 112) to the
center position.
Only one of the two climate control
systems in the rear compartment is
activated and is in air-recirculation mode.
X To deactivate: turn the temperature
control of rear-compartment heating
0026(Y page 111) or rear-compartment air-
conditioning system 0006(Ypage 112)
clockwise or counterclockwise. Only
change the temperature in small
increments. 116
Operating the climate control systemClimate control

Adjusting the air vents
Important safety notes
G
WARNING
Very hot or very cold air can flow from the air
vents .This could result in burns or frostbite in
the immediate vicinity of the air vents. There
is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air
outlets. If necessary, redirect the airflow to
another area of the vehicle interior.
The center and side air vents are adjustable.
On vehicles with arear-compartment air-
conditioning system, you can also adjust the
air vents in the roof duct.
i For virtually draft-free ventilation, adjust
the sliders of the center air vents to the
center position.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes:
R keep the air inlet grille on the hood free of
blockages, such as ice, snow or leaves.
R never cover the vents or the ventilation
grilles in the vehicle interior. Setting the center air vents
0005
Center air vent, left
0006 Center air vent, right
0026 Thumbwheel for center air vent, right
0025 Thumbwheel for center air vent, left X
To open: turn thumbwheel 0026to the right
or thumbwheel 0025to the left.
X To close: turn thumbwheel 0026to the left or
thumbwheel 0025to the right. Setting the side air vents
Side air vent (example: right-hand side of the
vehicle)
X
To open: turn thumbwheel 0026of side air
vents 0005upward.
X To close: turn thumbwheel 0026of side air
vents 0005downward.
i If the 0012 symbol can be seen on
thumbwheel 0026, defroster vent 0006is open. Adjusting air vents for the passenger
compartment
Air vents (example: right-hand side of the vehicle)
You can use the air vents to ventilate the
vehicle interior on the left and right, in the rear
and the headroom. Adjusting the air vents
117Climate control Z

X
To open: for the left-hand side of the
vehicle, tur nthumbwheel 0005or for the
right-hand side of the vehicle,
thumbwheel 0006of the air vents clockwise.
X To close: for the left-hand side of the
vehicle, turn thumbwheel 0005or for the
right-hand side of the vehicle,
thumbwheel 0006of the air vents counter-
clockwise. Adjusting the air vents in the roof duct
! Always leave at least one air vent open.
If the rear-compartment air conditioning is
switched on and all the air vents are closed,
the air-conditioning system may be
damaged. On vehicles with rear-compartment air
conditioning, adjustable air vents are
integrated into the roof duct.
X
To adjust the airflow: open or close the
air flap in air vents 0005as needed.
X To adjust the air distribution: turn air
vent 0005to the desired position. Operating the auxiliary heating
system
Important safety notes
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, for example in
enclosed spaces or if the vehicle gets stuck
in snow. There is a risk of fatal injury.
Switch the auxiliary heating off in enclosed
spaces without extraction systems, e.g. in
garages. If the vehicle is stuck in snow and
you have to leave the auxiliary heating
running, keep the exhaust pipe and the area
around the vehicle free 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. G
WARNING
When the auxiliary heating is switched on,
parts of the vehicle can become very hot, e.g.
the exhaust system. If flammable materials
such as leaves, grass or twigs remain in
contact with hot parts of the exhaust system
for a prolonged period, they could ignite.
There is a risk of fire.
When the auxiliary heating is switched on,
make sure that no flammable material can
come into contact with hot vehicle
components.
! Switch on the auxiliary heating system at
least once a month for approximately
10 minutes. The auxiliary heating could
otherwise be damaged.
! Make sure that the flow of hot air is not
blocked. The auxiliary heating will
otherwise overheat and switch off.
Your vehicle may be equipped with either an
auxiliary hot-water heater or an auxiliary
warm-air heater. Adjustment and operation of
the:
R hot-water auxiliary heater is done via the
on-board computer and with the auxiliary
heating button in the control panel
(Y page 119) or with the remote control
(Y page 121).
R auxiliary warm-air heater is done via the
timer above the overhead control panel
(Y page 122). 118
Operating the auxiliary heating systemClimate control

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

Operation with the remote control
Important information You can switch the auxiliary heating on/off
and set the operating duration using the
remote control. You can use up to 4 remote
control units on the vehicle. These must be
synchronized for the receiver in your vehicle
(Y page 122).
The remote control has a maximum range of
approximately 600 meters. This range is
reduced by:
R sources of interference
R solid objects between the remote control
and the vehicle
R the remote control being in an unfavorable
position in relation to the vehicle
R transmitting from an enclosed space
Overview of the remote control 0005
Indicator lamp
0006 To confirm settings
0026 To switch the remote control on/off, set
the operating duration or end or cancel
settings
Indicator lamp 0005lights up in various ways to
show differen toperating modes: Signaling Meaning
Lights up red Remote control switched
on
Data transfer Signaling Meaning
Flashes red Auxiliary heating switched
off
Lights up
green Auxiliary heating switched
on
Flashes green Change operating duration
active
Flashes
alternately
red and green Remote control in
synchronizing mode
i
When the remote control battery is weak,
indicator lamp 0005flashes red rapidly.
Replace the remote control battery
(Y page 126).
You can find further information on the lamp
status in the "Problems with the auxiliary
heating" section (Y page 128).
Switching the remote control on/off The remote control switches to standby mode
after 10 seconds. Indicator lamp
0005goes out.
X To switch on: press and hold the 0002
button until indicator lamp 0005lights up red.
If ac onnection between the remote control
and the receiver in the vehicle has been
established and indicator lamp 0005:
R flashes red, the auxiliary heating is
switched off.
R lights up green, the auxiliary heating is
switched on.
X To switch off: press and hold the 0002
button until indicator lamp 0005goes out.
Switching the auxiliary heating on/off X
Switch on the remote control.
X To switch on: when indicator lamp 0005
flashes red, press the 000Abutton.
During data transmission, indicator
lamp 0005lights up red. Operating the auxiliary heating system
121Climate control Z

When indicato
rlamp 0005lights up green, the
auxiliary heating is switched on.
X To switch off: when indicator lamp 0005
lights up green, press the 000Abutton.
During data transmission, indicator
lamp 0005lights up red.
When indicator lamp 0005flashes red, the
auxiliary heating is switched off.
Changing the operating duration X
Switch on the remote control.
X When indicator lamp 0005flashes red, press
0002 and000A simultaneously.
Indicato rlamp 0005flashes green.
X Press the 0002buttonrepeatedly until the
desired operating duration is shown.
R 20 minutes
Indicator lamp 0005flashes green twice.
R 30 minutes
Indicator lamp 0005flashes green three
times.
R 40 minutes
Indicator lamp 0005flashes green four
times.
R 60 minutes
Indicator lamp 0005flashes green six
times.
X Press the 000Abutton.
During data transmission, indicator
lamp 0005lights up red.
If indicator lamp 0005emits two long, green
flashes, the selected operatin gduration is
stored.
i If no adjustmen tis made, indicator
lamp 0005flashes six times and the remote
control goes into standby mode. Synchronizing the remote control X
Press the 0020auxiliary heating button in
the control panel (Y page 119) for longer
than 10 seconds.
When you press and hold the 0020button,
the red indicator lamp lights up in the
button.
When the red indicator lamp in the 0020
button flashes, the receiver in the vehicle
is ready for synchronizing.
X Press and hold the 0002remote control
button until indicator lamp 0005lights up red.
If there is an active connection between the
remote control and the receiver, indicator
lamp 0005flashes alternately red and green.
The remote control is in synchronizing
mode.
i If you press the 0002button againont he
remote control after starting
synchronization, you will only synchronize
this remote control unit with the receiver.
Any other remote control units that were
synchronized will be cleared. Indicator
lamp 0005flashes alternately red and green
(very slowly).
X Press the 000Abutton on the remote
control.
During data transmission, indicator
lamp 0005lights up red.
When remote control indicator lamp 0005
emits two long green flashes, the selected
operating time is synchronized. The
indicator lamp in the 0020auxiliary heating
button goes out. Operation with the timer
Important safety notes This is only for vehicles with a hot-water
auxiliary heater.
G
DANGER
If a switch-on time has been selected, the
auxiliary heating switches on automatically. 122
Operating the auxiliary heating systemClimate control

R
If the ventilation is insufficient, poisonous
exhaust gases can collect, in particular
carbon monoxide. This is the case in
enclosed spaces, for example .There is a
risk of fatal injuries.
R If highly flammable substances or
flammable materials are nearby, there is a
risk of a risk of fire and explosion.
Always deactivate the preselected switch-on
times if you stop the vehicle in such or similar
situations.
Use the timer to:
R activate/deactivate immediate heating
mode
R set up to three switch-on times
R set the operating duration from 10to
120 minutes or to continuous operation
R set the heating level (preselected
temperature) to a range between 10 and 30
Timer overview Timer above the overhead control panel
0005
Program column
0001 Sets preselection memory 1 – 3
(Y page 124)
Sets weekday (Mon. – Sun.)
(Y page 123)
0006 Menu bar
0020 Activates/deactivates immediate
heating mode (Y page 124)
0002 Sets the program times
(Y page 124) 0001
Sets the day, time and the operating
duration (Y page 123)
0004 Sets the heating level
(Y page 125)
0026 Display panel for: time, heating level
and operating duration
0005 Continuous operation mode active
0004 Heating level set
0025 Selects options in program column 0005or
menu bar 0006(forwards)
Increases values
0023 Confirms a selection or setting
0024 Status bar
0020 Heating mode activated
0018 Activates the timer
Cancels or ends settings in a menu
0019 Selects options in program column 0005or
menu bar 0006(backwards)
Reduces values
Activating the timer The timer switches to standby mode after
10 seconds. The display goes off.
X
Press and hold the 0002button until the
menu bar appears in the display and the
time is shown.
Setting the day, time and operating
duration You must reset the day, time, and default
value for the operating duration:
R
during initial operation
R after a voltage supply interruption (e.g. if
the battery has been disconnected)
R after a malfunction.
You can find further information on
malfunctions in the "Problems with the
auxiliary heating" section (Y page 128). Operating the auxiliary heating system
123Climate control Z