Get Controls -> Air conditioning Guide for Mercedes A Class 4 Door Second Generation (2004-2011)

Controls

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 The air conditioning combines a heating and The Thermotronic automatic air-conditioning

without a cooling system.

ventilation system with a cooling system.

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.

* optional

129

Controls

Air conditioning

General notes

i Ventilate the vehicle for a brief period

interval for replacing the filter, which is

during warm weather, e.g. using the con-

specified in the Service Booklet. As it

The air-conditioning system*/

venience opening feature ( Y page 86). This

depends on environmental conditions, e.g.

Thermotronic* controls the temperature and

will speed up the cooling process and the

heavy air pollution, the interval may be

the humidity of the vehicle interior and filters

desired vehicle interior temperature will be

shorter than stated in the Service Booklet.

out undesirable substances from the air.

reached more quickly.

G Risk of accident

Heatmatic/the air-conditioning system*/

Observe the settings recommended on the

i The integrated filter filters out most par-

Thermotronic* is only operational when the

following pages. The windows could other-

ticles of dust and completely filters out pol-

engine is running. Optimum operation is ach-

wise mist up. This may obstruct your view

len. A clogged filter reduces the amount of

ieved only when you drive with the side win-

of the traffic situation, thereby causing an

air supplied to the vehicle interior. For this

dows and panorama louvred sliding sun-

accident.

reason, you should always observe the

roof* closed.

* optional

130

Controls

Air conditioning

Overview of air-conditioning system functions

Heatmatic

Function

Sets the temperature

Sets the airflow

Sets the air distribution

P Demists the windscreen

Switches the air conditioning on/

P Demists the windscreen

off

Ä Activates/deactivates air-

P Demists the windscreen

recirculation mode

1 Switches the rear window

heating on/off

131

Controls

Air conditioning

i Notes and recommendations on optimum

outside odours or when in a tunnel. Oth-

air conditioning:

erwise, the windows could mist up due

to a lack of fresh air in air-recirculation

R Activate the air conditioning by turning

mode.

control knob 3 clockwise 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

Air-conditioning system*

* optional

132

Controls

Air conditioning

R Only use the "demisting" function until

Function

the windscreen is clear again.

Sets the temperature

1 Switches the rear window

R Only use the "air-recirculation mode"

heating on/off

briefly, e.g. when there are unpleasant

P Demists the windscreen

outside odours or when in a tunnel. Oth-

Sets the air distribution

Ä Activates/deactivates air-

erwise, the windows could mist up due

P Demists the windscreen

recirculation mode

to a lack of fresh air in air-recirculation

mode.

Sets the airflow

œ Switches cooling with air

dehumidification on/off

Switches the air conditioning on/

off

i Notes and recommendations on optimum

P Demists the windscreen

air conditioning:

R Activate the air conditioning by turning

control knob 3 clockwise to the desired

position (except position 0).

R Set the temperature to 22 †.

133

Controls

Air conditioning

Thermotronic*

Function

Q Sets the airflow

´ Switches the air conditioning

T Switches the residual heat

on/off

function on/off

U Controls the air conditioning

$ Increases the temperature,

Sets the air distribution

automatically

right

œ Switches cooling with air

| Demists the windscreen

1 Switches the rear window

dehumidification on/off

$ Increases the temperature,

heating on/off

% Reduces the temperature,

left

right

* optional

134

Controls

Air conditioning

Thermotronic*

Switching the air conditioning on/off

Function

X Turn the key to position 2 in the ignition

i When the air conditioning is switched off,

Display

lock.

the air supply and air circulation are also

% Reduces the temperature, left

switched off. Only select this setting briefly,

X To activate: press the ´ button.

otherwise the windows may mist up.

The indicator lamp in the ´ button goes

Ä Activates/deactivates air-

out. The previously selected settings come

recirculation mode

i Activate the air conditioning primarily

into effect again.

using the U button.

i Notes and recommendations on optimum

X Press the U button.

Heatmatic/air-conditioning system*

air conditioning:

The indicator lamp in the U button

X Turn the key to position 2 in the ignition

R Activate the air conditioning using

comes on. Airflow and air distribution are

the U and œ buttons. The indica-

lock.

set to automatic mode.

tor lamps on the U and œ buttons

X To activate: turn thumbwheel 3 clock-

X To deactivate: press the ´ button.

light up.

wise to the desired position (apart from the

The indicator lamp in the ´ button

0 position) ( Y page 131), ( Y page 132).

comes on.

R Set the temperature to 22 †.

X To deactivate: turn thumbwheel 3 anti-

R Only use the "demisting" function until

clockwise to position 0 ( Y page 131),

the windscreen is clear again.

( Y page 132).

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.

* optional

135

Controls

Air conditioning

X To switch on: press the œ button.

X Turn the key to position 2 in the ignition

Switching cooling with air dehumidi-

lock.

fication on/off

The indicator lamp in the œ button lights

up.

X Set the desired temperature.

The "cooling with dehumidification" function

X To deactivate: press the œ button.

X To activate: press the U button.

is only available when the engine is running.

The indicator lamp in the œ button goes

The indicator lamp in the U button

The air inside the vehicle is cooled and dehu-

out. The cooling with air dehumidification

comes on. Automatic air distribution and

midified according to the temperature selec-

function has a delayed switch-off feature.

airflow are activated.

ted. This prevents the windows from misting

up.

X To deactivate: press the U button.

G Risk of accident

The indicator lamp in the U button goes

Controlling the air conditioning auto-

out. The airflow is regulated to the level set.

If the "cooling with air dehumidification"

matically

The air distribution is set to the b posi-

function is deactivated, the air inside the

Only Thermotronic* features the "control air

vehicle will not be cooled (during warm

tion.

conditioning automatically" function.

weather) or dehumidified. The windows

In automatic mode, the set temperature is

could mist up more quickly. This may pre-

Setting the temperature

maintained automatically at a constant level.

vent you from observing the traffic condi-

The system automatically regulates the tem-

tions, thereby causing an accident.

Heatmatic/air-conditioning system*

perature of the dispensed air, the airflow and

H Environmental note

the air distribution.

You can set the temperature for the entire

The cooling system uses the refrigerant

The automatic air conditioning will achieve

vehicle.

R134A. This refrigerant does not damage

optimal operation if "cooling with air dehu-

X Turn the key to position 2 in the ignition

the earth's ozone layer.

midification" is also activated. If necessary,

lock.

cooling with air dehumidification can be deac-

X To increase/reduce: turn thumb-

Condensation may drip from the underside of

tivated.

wheel 1 clockwise or anti-clockwise

the vehicle when Thermatic is in cooling

( Y page 131), ( Y page 132). Only adjust the

mode.

temperature in small increments. Start at

The "cooling with air dehumidification" func-

22 †. 17

tion is only available with air conditioning* or

Thermotronic*.

17 Vehicles with air conditioning*

* optional

136

Controls

Air conditioning

Adjusting the side air vents

Thermotronic*

ice, snow and foliage, to guarantee the sup-

ply of fresh air into the vehicle interior.

Different temperatures can be set for the

R never cover the vents or air inlet and outlet

driver's and front-passenger sides.

grilles in the vehicle interior.

X Turn the key to position 2 in the ignition

lock.

i Position the sliders for the centre air

X To increase/reduce: press the $ or

vents in the central detent position for vir-

tually draught-free ventilation.

% button. Only change the temperature

setting in small increments. Start at 22 †.

Setting the centre air vents

The temperature is shown in the display.

Adjusting the air vents

X To open/close: turn thumbwheel 3 up or

G Risk of injury

down.

Very hot or very cold air can flow from the

i Demister vent 1 is never shut com-

air vents. This could cause burns or frost-

pletely, even if side air vent 2 is shut.

bite to bare skin in the immediate vicinity

of the vents. Keep bare skin away from

Setting the glove compartment air

these air outlets. If necessary, direct the

vent*

airflow away to a different area of the vehi-

cle interior.

The glove compartment can be ventilated, for

1 Centre air vent, left

instance, to cool its contents, when the air

Please observe the following notes to ensure

2 Centre air vent, right

conditioning*/Thermotronic* is activated.

that the air can flow freely through the air

3 Thumbwheel for centre air vent, right

The level of airflow depends on the airflow and

vents:

4 Thumbwheel for centre air vent, left

air distribution settings.

R keep the air inlet between the windscreen

X To open/close: turn thumbwheels 3 and

and the bonnet free of deposits, such as

! Close the glove compartment air vent

4 up or down.

when heating mode is activated. Open the

air vent and activate "cooling with air dehu-

* optional

137

Controls

Air conditioning

Setting the rear-compartment air vents

midification" if the outside temperature is

Setting the air distribution

high. Otherwise, temperature-sensitive

Heatmatic/air-conditioning system*

items stored in the glove compartment

could be damaged.

X Turn the key to position 2 in the ignition

lock.

X Turn thumbwheel 5 to the corresponding

symbol ( Y page 131), ( Y page 132). The

thumbwheel can also be turned to the area

between two symbols.

Thermotronic*

1 Rear-compartment air vent, left

X Turn the key to position 2 in the ignition

2 Rear-compartment air vent, right

lock.

3 Thumbwheel for rear-compartment air

X Turn thumbwheel 9 to the corresponding

1 Air vent thumbwheel

vents

symbol ( Y page 134). The thumbwheel can

2 Air vent

also be turned to the area between two

X To open/close: turn thumbwheel 3 to the

symbols.

X To open/close: turn thumbwheel 1

left or right.

clockwise or anti-clockwise.

* optional

138

Controls

Air conditioning

Thermotronic*

Setting the airflow

Demisting the windscreen

X Turn the key to position 2 in the ignition

Heatmatic/air-conditioning system*

i You should only select the "demisting"

lock.

function until the windscreen is clear again.

X Turn the key to position 2 in the ignition

X To activate: press the | button.

lock.

Heatmatic/air-conditioning system*

The indicator lamp in the | button

X To increase/reduce: turn thumbwheel

comes on.

X Turn the key to position 2 in the ignition

3 clockwise or anti-clockwise

The system automatically switches to the

lock.

( Y page 131), ( Y page 132).

following functions:

X To activate: switch on the cooling with air

R cooling with air dehumidification on

dehumidification. 18

Thermotronic*

R high airflow

X Deactivate air-recirculation mode.

X Turn the key to position 2 in the ignition

X Turn thumbwheel 1 clockwise to

R high temperature

lock.

P ( Y page 131), ( Y page 132).

R air distribution to the windscreen and

X To increase/reduce: turn thumbwheel

X Turn thumbwheel 3 clockwise to

front side windows

1 clockwise or anti-clockwise

P ( Y page 131), ( Y page 132).

( Y page 134).

R air-recirculation mode off

X Turn thumbwheel 5 clockwise or anti-

X To switch off: press the | button.

clockwise to P ( Y page 131),

The indicator lamp in the | button goes

( Y page 132).

out. The previously selected settings come

X To deactivate: turn thumbwheels 1, 3

into effect again. The cooling with air dehu-

and 5 to the desired position (apart from

midification function remains on. Air-recir-

the P position) ( Y page 131),

culation mode remains deactivated.

( Y page 132).

X Press the U button.

The indicator lamp in the | button goes

out. Airflow and air distribution are set to

automatic mode.

18 Only vehicles with an air-conditioning system*

* optional

139

Controls

Air conditioning

Demisting the windows

Switching the rear window heating

on/off

X Press one of the $ or % temperature

Windows misted up on the inside

buttons.

G Risk of accident

The indicator lamp in the | button goes

X Activate the "cooling with air dehumidifica-

Clear all windows of ice or snow before set-

out. The air distribution is directed towards

tion" function 19 .

ting off. Impaired visibility could otherwise

the windscreen. The air conditioning

X Activate the automatic air conditioning. 20

endanger you and others.

switches to manual mode.

X If the windows continue to mist up, activate

the "demisting" function.

i The rear window heating has a high cur-

X Turn thumbwheel 1 clockwise or anti-

rent draw. You should therefore switch it

clockwise ( Y page 134).

Windows misted up on the outside

off as soon as the window is clear, as it only

The indicator lamp in the | button goes

switches off automatically after several

X Activate the windscreen wipers.

out. The air distribution is directed towards

minutes.

the windscreen. The air conditioning

X Turn the air distribution thumbwheel to the

switches to manual mode.

Y or a symbol.

i If the battery voltage is too low, the rear

window heating may switch off.

i You should only select this setting until

the windscreen is clear again.

X Turn the key to position 2 in the ignition

lock.

X To activate, press the 1 21 /F 22 but-

ton.

The indicator lamp in the 1/F but-

ton lights up or goes out.

19 Vehicles with air conditioning*/Thermotronic*.

20 Vehicles with Thermotronic*.

21 Vehicles with an air-conditioning system*/Thermotronic*.

22 Vehicles with Heatmatic.

* optional

140

Controls

Air conditioning

X To deactivate: press the Ä button.

Activating/deactivating air-recircula-

window moves. If there is a risk of entrap-

tion mode

The indicator lamp in the Ä button goes

ment, press the Ä button again. Press

out.

the button for stopping, opening or closing

You can deactivate the flow of fresh air if

the side windows in the opposite direction

unpleasant odours are entering the vehicle

i Air-recirculation mode switches off auto-

as appropriate.

from outside. The air already inside the vehi-

matically:

Make sure that nobody can become trap-

cle will then be recirculated.

R after approximately five minutes at out-

ped as the panorama louvred sliding sun-

G Risk of accident

side temperatures below approximately

roof* is opened and closed. If there is a risk

Only switch over to air-recirculation mode

7†

of entrapment, press the Ä button

briefly at low outside temperatures. Other-

R after approximately 5 minutes if cooling

again. Press the button for stopping, open-

wise, the windows could mist up, thus

with air dehumidification 23 is switched

ing or closing the panorama louvred sun-

impairing visibility and endangering your-

off

roof* in the opposite direction as appropri-

self and others. This may prevent you from

ate.

R after approximately 30 minutes at out-

observing the traffic conditions, thereby

side temperatures above approximately

causing an accident.

X Convenience closing: press and hold

7†

the Ä button until the side windows and

X Turn the key to position 2 in the ignition

the panorama louvred sliding sunroof*

lock.

Convenience opening/closing feature

have closed.

X To activate: press the Ä button.

The indicator lamp in the Ä button lights

G Risk of injury

The indicator lamp in the Ä button lights

up. Air-recirculation mode is activated.

Make sure that nobody can become trap-

up.

ped between the side window and the door

X Convenience opening: press and hold the

i Air-recirculation mode is activated auto-

frame as the side windows are opened and

Ä button until the side windows have

matically at high outside temperatures.

closed. Do not place objects or lean against

returned to the original position.

When air-recirculation mode is activated

the side windows when they are being

The indicator lamp in the Ä button goes

automatically, the indicator lamp in the

opened or closed. You or the objects could

out. Air-recirculation mode is deactivated.

Ä button is not lit.

be drawn in or become trapped between

The panorama louvred sliding sunroof*

the side window and the door frame as the

Outside air is added after about 30

moves to the ventilation position.

minutes.

23 Vehicles with air conditioning*/Thermotronic*.

* optional

141

Controls -> Air conditioning for Your Mercedes A Class 4 Door Second Generation (2004-2011)

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