2008 MERCEDES-BENZ A-CLASS HATCHBACK light

Air conditioning
129Air 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
* option al
169_AKB; 2; 4, en-GB
wdomann
,V ersion: 2.10.6
2008-07-16T08:52:06+02:00 - Seite 129 ZDateiname: 6515_0315_02_buchblock.pdf; preflight

Air conditioning
130 General 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 86). 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. The windows could other-
wise mist up. This may obstruct your view
of the traffic situation, thereby causing an
accident. Cont
rols
* optional
169_AKB; 2; 4, en-GB
wdomann
,V ersion: 2.10.6
2008-07-16T08:52:06+02:00 - Seite 130 Dateiname: 6515_0315_02_buchblock.pdf; preflight

Air conditioning
131Overview 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
169_AKB; 2; 4, en-GB
wdomann,
Version: 2.10.6
2008-07-16T08:52:06+02:00 - Seite 131 ZDateiname: 6515_0315_02_buchblock.pdf; preflight

Air conditioning
132
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
169_AKB; 2; 4, en-GB
wdomann
,V ersion: 2.10.6
2008-07-16T08:52:06+02:00 - Seite 132 Dateiname: 6515_0315_02_buchblock.pdf; preflight

Air conditioning
133Function
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
169_AKB; 2; 4, en-GB
wdomann,
Version: 2.10.6 2008-07-16T08:52:06+02:00 - Seite 133 ZDateiname: 6515_0315_02_buchblock.pdf; preflight

Air conditioning
134
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
169_AKB; 2; 4, en-GB
wdomann
,V ersion: 2.10.6
2008-07-16T08:52:06+02:00 - Seite 134 Dateiname: 6515_0315_02_buchblock.pdf; preflight

Air conditioning
135Function
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 131), (Ypage 132).
X To deactivate: turn thumbwheel 3anti-
clockwise to position 0(Y page 131),
(Y page 132). 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
* option al
169_AKB; 2; 4, en-GB
wdomann
,V ersion: 2.10.6
2008-07-16T08:52:06+02:00 - Seite 135 ZDateiname: 6515_0315_02_buchblock.pdf; preflight

Air conditioning
136 Switching 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 131), (Y page 132). Only adjust the
temperature in small increments. Start at
22 †. 17
17 Vehicles with air conditioning* Controls
* optional
169_AKB; 2; 4, en-GB
wdomann,
Version: 2.10.6
2008-07-16T08:52:06+02:00 - Seite 136 Dateiname: 6515_0315_02_buchblock.pdf; preflight