Get Climate control -> Operating the climate control system Guide for Mercedes A Class 4 Door Third Generation (2012-2017)

Operating the climate control system

140

R

Use theresidual heat functionif you want to

heat or ventilate the vehicle interior when

the ignition is switched off. The residual

heat function can only be activated or deac-

tivated with the ignition switched off.

Operating the climate control system

Switching the climate control on or off

General notes

When the climate control is switched off, the

air supply and air circulation are also

switched off. The windows could mist up.

Therefore, only switch off climate control

briefly.

R

If you change the settings of the climate

control system, the climate status display

appears for approximately three seconds

at the bottom of the screen in the Audio/

COMAND display (see separate operating

instructions). You will see the current set-

tings of the various climate control func-

tions.

Air-conditioning system

X

Turn the key to position 2 in the ignition

lock (Y page 157).

To switch on: turn control A clockwise to

the desired position (except position 0)

(Y page 137).

To switch off: turn control A anti-clock-

DYNAMIC SELECT button (except

Mercedes-AMG vehicles)

X

You can choose between various drive pro-

grams with the DYNAMIC SELECT button

(Y page 166).

X

wise to position 0 (Y page 137).

If you have selected drive program E:

R

when heating, the electrical heater booster

is deactivated and in the warming-up phase

heat output is reduced

the rear window heating running time is

reduced

THERMOTRONIC automatic climate

control

X

Turn the key to position 2 in the ignition

R

lock (Y page 157).

X

To activate: press the Ã button.

Depending on the configuration, the climate

settings can also be influenced in drive pro-

gram I.

If you have selected drive program C or S, the

climate settings are not affected.

The indicator lamp in the Ã button lights

up. Airflow and air distribution are set to

automatic mode.

or

X

Press the ^ button.

The indicator lamp in the ^ button goes

out. The previous settings are reactivated.

ECO start/stop function

During automatic engine switch-off, the cli-

mate control only operates at a reduced capa-

city. If you require the full climate control out-

put, you can switch off the ECO start/stop

function by pressing the ECO button

(Y page 163).

X

To deactivate: press the ^ button.

The indicator lamp in the ^ button lights

up.

i THERMOTRONIC automatic climate con-

trol: switch on climate control primarily

using the Ã button.

Operating the climate control system

141

Activating/deactivating cooling with

air dehumidification

General notes

If you deactivate the "Cooling with air dehu-

midification" function, the air inside the vehi-

cle will not be cooled. The air inside the vehi-

cle will also not be dehumidified. The win-

dows can mist up more quickly. Therefore,

only deactivate the "Cooling with air dehu-

midification" function briefly.

The "Cooling with air dehumidification" func-

tion is only available when the engine is run-

ning. The air inside the vehicle is cooled and

dehumidified according to the temperature

selected.

Condensation may drip from the underside of

the vehicle when cooling mode is active. This

is normal and not a sign that there is a mal-

function.

Activating/deactivating

X

To activate: press the ¿ button.

The indicator lamp in the ¿ button lights

up.

X

To deactivate: press the ¿ button.

The indicator lamp in the ¿ button goes

out. The cooling with air dehumidification

function has a delayed switch-off feature.

Operating the climate control system

142

Problems with the "Cooling with air dehumidification" function

Problem

Possible causes/consequences and M Solutions

The indicator lamp in

the ¿ button

The cooling with air dehumidification function has been deactiva-

ted due to a malfunction.

flashes three times or

remains off. The cool-

ing with air dehumidifi-

cation function cannot

be activated.

X

Visit a qualified specialist workshop.

X

To switch to manual mode: press the

É or Ë button.

Setting climate control to automatic

mode

or

X

General notes

Press the K or I button.

The indicator lamp in the Ã button goes

out. Automatic air distribution and airflow

are deactivated.

Only THERMOTRONIC automatic climate con-

trol features the "Control climate control

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.

Setting the temperature

Air-conditioning system

The automatic mode functions optimally

when the "Cooling with air dehumidification"

function is activated. If desired, cooling with

air dehumidification can be deactivated.

You can set the temperature for the entire

vehicle. The set temperature is automatically

maintained at a constant level.

X

Turn the key to position 2 in the ignition

If you deactivate the "Cooling with air-dehu-

midification" function, the air inside the vehi-

cle will not be cooled. The air inside the vehi-

cle will also not be dehumidified. The win-

dows can mist up more quickly. Therefore,

only deactivate the "Cooling with air-dehu-

midification" function briefly.

lock (Y page 157).

To increase/reduce: turn control : anti-

clockwise or clockwise (Y page 137). Only

change the temperature setting in small

increments. Start at 22 †.

X

THERMOTRONIC automatic climate

control

Setting climate control to automatic

mode

Different temperatures can be set for the

driver's and front-passenger sides. The set

temperature is automatically maintained at a

constant level.

X

Turn the key to position 2 in the ignition

lock (Y page 157).

X

Set the desired temperature.

X

Turn the key to position 2 in the ignition

lock (Y page 157).

To increase/reduce: turn control : or E

anti-clockwise or clockwise (Y page 139).

X

To activate: press the Ã button.

The indicator lamp in the Ã button lights

up. Automatic air distribution and airflow

are activated.

X

Operating the climate control system

143

Only change the temperature setting in

small increments. Start at 22 †.

S Directs the airflow through the centre

and side air vents as well as the foot-

well air vents

b Directs the airflow through the centre

and side air vents as well as the demis-

ter vents

Setting the air distribution

Air-conditioning system

Air distribution settings

a Directs the airflow through the foot-

well and demister vents

_ Directs the airflow through the demis-

ter vents, the centre and side air vents

as well as the footwell air vents

¯ Directs the airflow through the demis-

ter vents

P Directs the airflow through the centre

and side air vents

O Directs the airflow through the foot-

i Regardless of the air distribution setting,

airflow is always directed through the side

air vents. The side air vents can only be

closed if the adjusters are turned clockwise

until they engage.

well air vents

i You can also activate several of the air

distribution settings simultaneously. In

order to do this, press several of the air

distribution buttons. The air is then routed

through different air vents.

Setting the air distribution

X

Turn the key to position 2 in the ignition

lock (Y page 157).

X

Press the É or Ë button repeatedly

until the desired symbol appears in the dis-

play.

i Regardless of the air distribution setting,

airflow is always directed through the side

air vents. The side air vents can only be

closed if the adjusters are turned clockwise

until they engage.

Setting the airflow

Setting the air distribution

Air-conditioning system

X

Turn the key to position 2 in the ignition

lock (Y page 157).

Press one or more of the P, O, ¯

buttons.

The corresponding indicator lamp comes

on.

X

Turn the key to position 2 in the ignition

lock (Y page 157).

To increase/reduce: turn control A anti-

clockwise or clockwise (Y page 137).

X

THERMOTRONIC automatic climate

control

THERMOTRONIC automatic climate

control

X

Turn the key to position 2 in the ignition

Air distribution settings

lock (Y page 157).

To increase/reduce: press the K or

I button.

¯ Directs the airflow through the demis-

X

ter vents

P Directs the airflow through the centre

and side air vents

O Directs the airflow through the foot-

Switching the ZONE function on/off

well air vents

This function is only available with

THERMOTRONIC automatic climate control.

Operating the climate control system

144

X

To activate: press the á button.

The indicator lamp in the á button lights

up.

i You can adjust the blower output man-

ually while the "Windscreen demisting"

function is in operation:

R

The temperature setting for the driver's

side is not adopted for the front-passenger

side.

Air-conditioning system: turn airflow

control A anti-clockwise or clockwise

(Y page 137).

R

THERMOTRONIC automatic climate con-

trol: press the ó or ô button.

X

To deactivate: press the á button.

The indicator lamp in the á button goes

out.

X

To deactivate: press the ¬ button.

The indicator lamp in the ¬ button goes

out. The previous settings are reactivated.

Air-recirculation mode remains deactiva-

ted.

The temperature setting for the driver's

side is adopted for the front-passenger

side.

or

Demisting the windscreen

General notes

X

THERMOTRONIC automatic climate con-

trol: press the Ã button.

The indicator lamp in the ¬ button goes

out. Airflow and air distribution are set to

automatic mode.

You can use this function to defrost the wind-

screen or to demist the inside of the wind-

screen and the side windows.

or

X

Air-conditioning system: turn temperature

control : anti-clockwise or clockwise

(Y page 137).

i You should only select the "Windscreen

demisting" function until the windscreen is

clear again.

THERMOTRONIC automatic climate con-

trol: turn temperature control : or E anti-

clockwise or clockwise (Y page 139).

Switching the "Windscreen demisting"

function on/off

X

Turn the key to position 2 in the ignition

lock (Y page 157).

To activate: press the ¬ button.

The indicator lamp in the ¬ button lights

up.

The climate control system switches to the

following functions:

Demisting the windows

Windows misted up on the inside

Air-conditioning system

X

Activate the ¿ "Cooling with air dehu-

midification" function.

R

high airflow

X

If the windows continue to mist up, activate

R

high temperature

the ¬ "Windscreen demisting" function.

i You should only select this setting until

the windscreen is clear again.

R

air distribution to the windscreen and

front side windows

R

air-recirculation mode off

i The "Windscreen demisting" function

automatically sets the blower output to the

optimum demisting effect. As a result, the

airflow may increase or decrease automat-

ically after the ¬ button is pressed.

Operating the climate control system

145

THERMOTRONIC automatic climate con-

trol

X

Activate the ¿ "Cooling with air dehu-

midification" function.

X

Activate automatic mode Ã.

If the windows continue to mist up, activate

the ¬ "Windscreen demisting" function.

i You should only select this setting until

the windscreen is clear again.

Windows misted up on the outside

X

Activate the windscreen wipers.

X

Set the air distribution to P or O.

i You should only select this setting until

the windscreen is clear again.

Rear window heating

General notes

The rear window heating has a high current

draw. You should therefore switch it off as

soon as the window is clear. It otherwise

switches off automatically after several

minutes.

If the battery voltage is too low, the rear win-

dow heating may switch off.

Switching on/off

X

Turn the key to position 2 in the ignition

lock (Y page 157).

X

Press the ¤ button.

The indicator lamp in the ¤ button lights

up or goes out.

Operating the climate control system

146

Problems with the rear window heating

Problem

Possible causes/consequences and M Solutions

The rear window heat- The battery has not been sufficiently charged.

ing has switched off

prematurely or cannot

be activated.

X

Switch off any consumers that are not required, e.g. reading

lamps, interior lighting or the seat heating.

When the battery is sufficiently charged, the rear window heat-

ing can be activated again.

X

To deactivate: press the e button.

The indicator lamp in the e button goes

out.

Switching air-recirculation mode

on/off

General notes

i Air-recirculation mode is deactivated

You can deactivate the flow of fresh air if

unpleasant odours are entering the vehicle

from outside. The air already inside the vehi-

cle will then be recirculated.

If you activate air-recirculation mode, the win-

dows can mist up more quickly, in particular

at low temperatures. Only use air-recircula-

tion mode briefly to prevent the windows

misting up.

automatically:

R

after approximately five minutes at out-

side temperatures below approximately

7 †

R

after approximately five minutes if the

"Cooling with air dehumidification" func-

tion is deactivated

R

after approximately 30 minutes at out-

side temperatures above approximately

7 † if the cooling with air dehumidifica-

tion function is activated

The operation of air-recirculation mode is the

same for all control panels.

Switching on/off

X

Turn the key to position 2 in the ignition

lock (Y page 157).

Convenience opening or closing using

the air-recirculation button

X

To activate: press the e button.

The indicator lamp in the e button lights

WARNING

G

When the convenience closing feature is oper-

ating, parts of the body could become trapped

in the closing area of the side window and the

sliding sunroof. There is a risk of injury.

Observe the complete closing procedure

when the convenience closing feature is oper-

ating. When closing make sure that no parts of

the body are in the closing area.

up.

THERMOTRONIC automatic climate con-

trol: air-recirculation mode is activated auto-

matically:

R

at high outside temperatures

at high levels of pollution

When air-recirculation mode is activated

automatically, the indicator lamp in the e

button is not lit. Outside air is added after

about 30 minutes.

R

WARNING

G

During convenience opening parts of the body

could be drawn in or become trapped

between the side window and window frame.

There is a risk of injury.

Operating the climate control system

147

^XConvenience opening feature (vehicles

with panorama sliding sunroof): press

and hold the e button until the side

When opening, make sure that nobody is

touching the side window. If someone

becomes trapped, immediately press

windows and the panorama sliding sunroof

are open. The side windows and the pano-

rama sliding sunroof move back to their

original position.

The indicator lamp in the e button goes

out. Air-recirculation mode is deactivated.

^XConvenience opening feature (vehicles

without panorama sliding sunroof):

press and hold the e button until the

side windows are open. The side windows

move back to their original positions.

the W switch in the door to stop the move-

ment of the side windows. To continue closing

the side window, pull on the W switch.

^XConvenience closing feature (vehicles

with panorama sliding sunroof): press

and hold the e button until the side

windows and the panorama sliding sunroof

are closed.

The indicator lamp in the e button lights

up. Air-recirculation mode is activated.

^XConvenience closing feature (vehicles

without panorama sliding sunroof):

press and hold the e button until the

side windows are closed.

The indicator lamp in the e button lights

up. Air-recirculation mode is activated.

The indicator lamp in the e button goes

out. Air-recirculation mode is deactivated.

i If you open the side windows or the pan-

orama sliding sunroof manually after clos-

ing with the convenience closing feature,

they will remain in this position when

opened using the convenience opening fea-

ture.

If parts of the body are in the closing area

during convenience closing, proceed as fol-

lows:

X

Press the W button to stop the side win-

Switching the residual heat on/off

General notes

dows.

The side windows stop.

To then open the side window, press the

W button again.

X

The residual heat function is only available

with THERMOTRONIC automatic climate con-

trol.

It is possible to make use of the residual heat

of the engine to continue heating the vehicle

for approximately 30 minutes after the engine

has been switched off. The heating time

depends on the set interior temperature.

or

X

Press and hold the e button again for at

least two seconds.

The side windows move in the opposite

direction.

^XOnly vehicles with panorama sliding

sunroof: press the 3 switch to stop the

panorama sliding sunroof.

i The blower will run at a low speed regard-

less of the airflow setting.

The panorama sliding sunroof stops.

X

To then open the panorama sliding sunroof,

pull back on the 3 switch.

i If you activate the residual heat function

at high temperatures, only the ventilation

will be activated. The blower runs at

medium speed.

i Observe the notes on the automatic

reversing feature for:

R

the side windows (Y page 94)

the panorama sliding sunroof

(Y page 99)

i You cannot use the ventilation to cool the

vehicle interior to a temperature lower than

the outside temperature.

R

Z

Operating the climate control system

148

Switching on/off

Flammable materials such as leaves, grass or

twigs may ignite if they come into contact

with:

X

Turn the key to position 0 in the ignition

lock or remove it (Y page 157).

R

hot parts of the exhaust system

X

To activate: press the Ì button.

R

the exhaust gas itself

The indicator lamp in the Ì button lights

up.

There is a risk of fire.

X

To deactivate: press the Ì button.

The indicator lamp in the Ì button goes

When the auxiliary heating is switched on,

make sure that:

out.

R

no flammable materials come into contact

with hot vehicle components

the exhaust gas can escape from the

exhaust pipe unhindered

the exhaust gas does not come into contact

i Residual heat is deactivated automati-

cally:

R

after approximately 30 minutes

R

when the ignition is switched on

with flammable materials.

R

if the battery voltage drops

R

when the auxiliary heating is switched on The auxiliary heating and the exhaust gas out-

let are situated in front of the right-hand front

wheel.

Auxiliary heating

! Operating the auxiliary heating/ventila-

tion draws on the vehicle battery. After you

have heated or ventilated the vehicle a

maximum of two times, drive for a longer

distance.

Important safety notes

DANGER

G

If the exhaust pipe is blocked or sufficient

ventilation is not possible, toxic exhaust

fumes can enter the vehicle, especially car-

bon monoxide. This is the case, e.g. in

enclosed spaces, or if the vehicle is stuck in

snow. There is a risk of fatal injuries.

You should switch off the auxiliary heating in

enclosed spaces which do not have an extrac-

tion system, e.g. a garage. If the vehicle is

stuck in snow and you must leave the auxiliary

heating running, keep the exhaust pipe and

the area around the vehicle clear of snow. To

guarantee a sufficient supply of fresh air, open

a window on the side of the vehicle away from

the wind.

Switch the auxiliary heating on regularly once

a month for about ten minutes.

The auxiliary heating timer function calcu-

lates the switch-on time according to the out-

side temperature so that the vehicle is pre-

heated by the departure time. When the

departure time is reached, the auxiliary heat-

ing continues to heat for a further five

minutes and then switches off.

The auxiliary heating heats the air in the vehi-

cle interior to the set temperature. This

occurs without using the heat of the running

engine. The auxiliary heating is operated

directly using the vehicle's fuel. For this rea-

son, the fuel tank must be at least Õ full to

ensure that the auxiliary heating functions.

The auxiliary heating/ventilation automati-

cally adjusts to changes in temperature and

weather conditions. For this reason, the aux-

iliary heating could switch from ventilation

mode to heating mode or from heating mode

to ventilation mode.

WARNING

G

When the auxiliary heating is switched on,

parts of the vehicle can become very hot.

Operating the climate control system

149

The auxiliary heating switches off when the

The colours of the indicator lamps on but-

ton : signify the following:

engine is switched off. The auxiliary ventila-

tion switches off when you turn the key to key

position 2 (Y page 157).

The auxiliary heating switches off automati-

cally after 50 minutes.

You cannot use the auxiliary ventilation to

cool the vehicle interior to a temperature

lower than the outside temperature.

R

Blue: auxiliary ventilation activated

R

Red: auxiliary heating activated

R

Yellow: departure time preselected

(Y page 252)

Switching on the auxiliary heating/venti-

lation

X

Press button :.

Before switching on

The red or blue indicator lamp in button :

lights up.

X

Turn the key to position 2 in the ignition

lock (Y page 157).

Set the desired temperature.

Switching off the auxiliary heating/venti-

lation

X

Auxiliary heating or ventilation can also be

switched on if the manually set climate con-

trol is activated. Optimum comfort is attained

by setting the system to automatic mode. Set

the temperature to 22 †.

The auxiliary heating/ventilation can be acti-

vated or deactivated using the remote control

or the button on the centre console.

X

Press button :.

The red or blue indicator lamp in button :

goes out.

Switching the auxiliary heating/venti-

lation on or off using the remote control

General notes

Your vehicle comes with one remote control.

You may use two additional remote controls

for your vehicle. For more information, please

contact a qualified specialist workshop.

The on-board computer can be used to spec-

ify up to three departure times, one of which

may be preselected (Y page 252).

Switching the auxiliary heating/venti-

lation on or off using the button on the

centre console

Store the remote control for the auxiliary

heating so that the auxiliary heating cannot

be switched on unintentionally. In particular,

ensure that the remote control for the auxili-

ary heating is kept out of the reach of chil-

dren.

General notes

The remote control has a range of approx-

imately 300 metres. This range is reduced by:

R

sources of radio interference

R

solid objects between the remote control

and the vehicle

R

the remote control being in an unfavoura-

ble position in relation to the vehicle

R

transmitting from an enclosed space

If the remote control battery is low, the bat-

tery symbol on the left of the display is shown

as empty. Replace the remote control battery

Z

Climate control -> Operating the climate control system for Your Mercedes A Class 4 Door Third Generation (2012-2017)

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