MERCEDES-BENZ B-CLASS HATCHBACK 2008 Owners Manual

Air conditioning
128 Air conditioning
Overview of air-conditioning systems
The vehicle is equipped with one of the following air-conditioning systems: Heatmatic
16 Air-conditioning system* Thermotronic*
Heatmatic is a heating and ventilation system
without a cooling system. The air conditioning combines a heating and
ventilation system with a cooling system. The Thermotronic automatic air-conditioning
system combines an automatic heating and
ventilation system with a cooling system. You
can control the air conditioning separately for
the driver's and front-passenger sides.
16
Only in certain countries. Cont
rols
* optional
245_AKB; 2; 7, en-GB
wdomann,
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Air conditioning
129General notes
The air-conditioning system*/
Thermotronic* controls the temperature and
the humidity of the vehicle interior and filters
out undesirable substances from the air.
Heatmatic/the air-conditioning system*/
Thermotronic* is only operational when the
engine is running. Optimum operation is ach-
ieved only when you drive with the side win-
dows and panorama louvred sliding sun-
roof* closed. i
Ventilate the vehicle for a brief period
during warm weather, e.g. using the con-
venience opening feature (Y page 84). This
will speed up the cooling process and the
desired vehicle interior temperature will be
reached more quickly.
i The integrated filter filters out most par-
ticles of dust and completely filters out pol-
len. A clogged filter reduces the amount of
air supplied to the vehicle interior. For this
reason, you should always observe the interval for replacing the filter, which is
specified in the Service Booklet. As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Service Booklet. G
Risk of accident
Observe the settings recommended on the
following pages. Otherwise, the windows
could mist up. This may obstruct your view
of the traffic situation and, as a result, you
may cause an accident. Cont
rols
* optional
245_AKB; 2; 7, en-GB
wdomann, Version: 2.11.4
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Air conditioning
130 Overview of air-conditioning system functions
Heatmatic Function
1
Sets the temperature
P
Demists the windscreen 2
Ä
Activates/deactivates air-
recirculation mode Function
3
Sets the airflow
Switches the air conditioning on/
off
P
Demists the windscreen 4
1
Switches the rear window
heating on/off Function
5
Sets the air distribution
P
Demists the windscreen Cont
rols
245_AKB; 2; 7, en-GB
wdomann, Version: 2.11.4
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Air conditioning
131
i
Notes and recommendations on optimum
air conditioning:
R Activate the air conditioning by turning
control knob 3clockwise to the desired
position (except position 0).
R Only use the "demisting" function until
the windscreen is clear again.
R Only use the "air-recirculation mode"
briefly, e.g. when there are unpleasant outside odours or when in a tunnel. Oth-
erwise, the windows could mist up due
to a lack of fresh air in air-recirculation
mode.
Air-conditioning system* Cont
rols
* optional
245_AKB; 2; 7, en-GB
wdomann,
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Air conditioning
132 Function
1
Sets the temperature
P
Demists the windscreen 2
Ä
Activates/deactivates air-
recirculation mode 3
Sets the airflow
Switches the air conditioning on/
off
P
Demists the windscreen Function
4
1
Switches the rear window
heating on/off 5
Sets the air distribution
P
Demists the windscreen 6
œ
Switches cooling with air
dehumidification on/off i
Notes and recommendations on optimum
air conditioning:
R Activate the air conditioning by turning
control knob 3clockwise to the desired
position (except position 0).
R Set the temperature to 22 †. R
Only use the "demisting" function until
the windscreen is clear again.
R Only use the "air-recirculation mode"
briefly, e.g. when there are unpleasant
outside odours or when in a tunnel. Oth-
erwise, the windows could mist up due
to a lack of fresh air in air-recirculation
mode. Cont
rols
245_AKB; 2; 7, en-GB
wdomann,
Version: 2.11.4
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Air conditioning
133
Thermotronic*
Function
1
Q
Sets the airflow 2
U
Controls the air conditioning
automatically 3
|
Demists the windscreen 4
$
Increases the temperature,
left Function
5
´
Switches the air conditioning
on/off 6
$
Increases the temperature,
right 7
1
Switches the rear window
heating on/off Function
8
T
Switches the residual heat
function on/off 9
Sets the air distribution
a
œ
Switches cooling with air
dehumidification on/off b
%
Reduces the temperature,
right Cont
rols
* optional
245_AKB; 2; 7, en-GB
wdomann,
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Air conditioning
134 Function
c
Display
d
%
Reduces the temperature, left e
Ä
Activates/deactivates air-
recirculation mode i
Notes and recommendations on optimum
air conditioning:
R Activate the air conditioning using
the U andœ buttons. The indica-
tor lamps on the Uandœ buttons
light up.
R Set the temperature to 22 †.
R Only use the "demisting" function until
the windscreen is clear again.
R Only use the "air-recirculation mode"
briefly, e.g. when there are unpleasant
outside odours or when in a tunnel. Oth-
erwise, the windows could mist up due
to a lack of fresh air in air-recirculation
mode.
R You can use the residual heat to heat or
ventilate the vehicle interior after you
have switched off the ignition. Switching the air conditioning on/off
i When the air conditioning is switched off,
the air supply and air circulation are also
switched off. Only select this setting briefly,
otherwise the windows may mist up.
i Activate the air conditioning primarily
using the Ubutton.
Heatmatic/air-conditioning system* X
Turn the key to position 2in the ignition
lock.
X To activate: turn thumbwheel 3clock-
wise to the desired position (apart from the
0 position) (Y page 130), (Ypage 131).
X To deactivate: turn thumbwheel 3anti-
clockwise to position 0(Y page 130),
(Y page 131). Thermotronic* X
Turn the key to position 2in the ignition
lock.
X To activate: press the´button.
The indicator lamp in the ´button goes
out. The previously selected settings come
into effect again.
or
X Press the Ubutton.
The indicator lamp in the Ubutton
comes on. Airflow and air distribution are
set to automatic mode.
X To deactivate: press the´button.
The indicator lamp in the ´button
comes on. Cont
rols
* optional
245_AKB; 2; 7, en-GB
wdomann,
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Air conditioning
135Switching cooling with air dehumidi-
fication on/off
The "cooling with dehumidification" function
is only available when the engine is running.
The air inside the vehicle is cooled and dehu-
midified according to the temperature selec-
ted. This prevents the windows from misting
up. G
Risk of accident
If the "cooling with air dehumidification"
function is deactivated, the air inside the
vehicle will not be cooled (during warm
weather) or dehumidified. The windows
could mist up more quickly. This may pre-
vent you from observing the traffic condi-
tions, thereby causing an accident. H
Environmental note
The cooling system uses the refrigerant
R134A. This refrigerant does not damage
the earth's ozone layer.
Condensation may drip from the underside of
the vehicle when Thermatic is in cooling
mode.
The "cooling with air dehumidification" func-
tion is only available with air conditioning* or
Thermotronic*. X
To switch on: press theœbutton.
The indicator lamp in the œbutton lights
up.
X To deactivate: press theœbutton.
The indicator lamp in the œbutton goes
out. The cooling with air dehumidification
function has a delayed switch-off feature. Controlling the air conditioning auto-
matically
Only Thermotronic* features the "control air
conditioning automatically" function.
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the tem-
perature of the dispensed air, the airflow and
the air distribution.
The automatic air conditioning will achieve
optimal operation if "cooling with air dehu-
midification" is also activated. If necessary,
cooling with air dehumidification can be deac-
tivated. X
Turn the key to position 2in the ignition
lock.
X Set the desired temperature.
X To activate: press theUbutton.
The indicator lamp in the Ubutton
comes on. Automatic air distribution and
airflow are activated.
X To deactivate: press theUbutton.
The indicator lamp in the Ubutton goes
out. The airflow is regulated to the level set.
The air distribution is set to the bposi-
tion. Setting the temperature
Heatmatic/air-conditioning system* You can set the temperature for the entire
vehicle.
X
Turn the key to position 2in the ignition
lock.
X To increase/reduce: turn thumb-
wheel 1clockwise or anti-clockwise
(Y page 130), (Y page 131). Only adjust the
temperature in small increments. Start at
22 †. 17 Cont
rols
* optional
245_AKB; 2; 7, en-GB
wdomann, Version: 2.11.4
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Air conditioning
136
Thermotronic* Different temperatures can be set for the
driver's and front-passenger sides.
X Turn the key to position 2in the ignition
lock.
X To increase/reduce: press the$or
% button. Only change the temperature
setting in small increments. Start at 22 †.
The temperature is shown in the display. Adjusting the air vents
G
Risk of injury
Very hot or very cold air can flow from the
air vents. This could cause burns or frost-
bite to bare skin in the immediate vicinity
of the vents. Keep bare skin away from
these air outlets. If necessary, direct the
airflow away to a different area of the vehi-
cle interior.
Please observe the following notes to ensure
that the air can flow freely through the air
vents:
R keep the air inlet between the windscreen
and the bonnet free of deposits, such as ice, snow and foliage, to guarantee the sup-
ply of fresh air into the vehicle interior.
R never cover the vents or air inlet and outlet
grilles in the vehicle interior.
i Position the sliders for the centre air
vents in the central detent position for vir-
tually draught-free ventilation.
Setting the centre air vents 1
Centre air vent, left
2 Centre air vent, right
3 Thumbwheel for centre air vent, right
4 Thumbwheel for centre air vent, left X
To open/close: turn thumbwheels 3and
4 up or down.
Adjusting the side air vents X
To open/close: turn thumbwheel 3up or
down.
i Demister vent 1is never shut com-
pletely, even if side air vent 2is shut.
Setting the glove compartment air
vent* The glove compartment can be ventilated, for
instance, to cool its contents, when the air
conditioning*/Thermotronic* is activated.
17 Vehicles with air conditioning* Cont
rols
* optional
245_AKB; 2; 7, en-GB
wdomann,
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Air conditioning
137
The level of airflow depends on the airflow and
air distribution settings.
!
Close the glove compartment air vent
when heating mode is activated. At high
outside temperatures, open the air vent
and activate the "cooling with air dehumid-
ification" function. Otherwise, tempera-
ture-sensitive items stored in the glove
compartment could be damaged. 1
Air vent thumbwheel
2 Air vent
X To open/close: turn thumbwheel 1
clockwise or anti-clockwise. Setting the rear-compartment air vents 1
Rear-compartment air vent, left
2 Rear-compartment air vent, right
3 Thumbwheel for rear-compartment air
vents
X To open/close: turn thumbwheel 3to the
left or right. Setting the air distribution
P directs the airflow through the demis-
ter vents
Z directs the airflow through the demis-
ter vents
b directs the airflow to the entire vehicle
interior
Y directs the airflow through the footwell
and side air vents
a directs the airflow to the centre and
side air vents
Heatmatic/air-conditioning system* X
Turn the key to position 2in the ignition
lock.
X Turn thumbwheel 5to the corresponding
symbol ( Ypage 130), ( Ypage 131). The
thumbwheel can also be turned to the area
between two symbols.
Thermotronic* X
Turn the key to position 2in the ignition
lock.
X Turn thumbwheel 9to the corresponding
symbol ( Ypage 133). The thumbwheel can Controls
* optional
245_AKB; 2; 7, en-GB
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