MERCEDES-BENZ CLA 2017 Owners Manual

Overview of climate control systems
General notes Observe the settings recommended on the fol-
lowing pages. The windows could otherwise fog
up.
To prevent the windows from fogging up: R
switch off climate control only briefly R
switch on air-recirculation mode only briefly R
switch on the cooling with air dehumidifica-
tion function R
switch on the defrost windshield function
briefly, if required
The air-conditioning system or dual-zone auto-
matic climate control regulates the temperature
and the humidity of the vehicle interior and fil-
ters undesirable substances from the air.
The air-conditioning system or dual-zone auto-
matic climate control can only be operated
when the engine is running. Optimum operation
is only achieved with the side windows and pan-
orama roof with power tilt/sliding panel closed.
If you start the engine using your smartphone,
the last selected climate control setting is reac-
tivated ( Y
page 122).
The residual heat function can only be activated
or deactivated with the ignition switched off
( Y
page 118). Always keep the ventilation flaps behind the
side trim panel in the cargo compartment clear
( Y
page 105). Otherwise the vehicle will not be
ventilated correctly.
i Ventilate the vehicle for a brief period during
warm weather, e.g. using the convenience
opening feature ( Y
page 82). This will speed
up the cooling process and the desired inte-
rior temperature will be reached more
quickly.
i The integrated filter filters out most parti-
cles of dust and soot and completely filters
out pollen. It also reduces gaseous pollutants
and odors. 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 Maintenance Booklet. As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Maintenance Book-
let.
i It is possible that under certain circumstan-
ces the residual heat function may be activa-
ted automatically an hour after the SmartKey
has been removed in order to dry the aut o-
mat ic climate control. The vehicle is then ven-
tilated for 30 minutes.Overview of climate control systems 109
Climate control

Air-conditioning system cont rol panel
US A only
C
Sets th e temperature ( Y
page 115)D
Defrost s th e windshield ( Y
page 116)

Control panel for dual-zone automatic climate control
US A only
C
Sets the temperature, left ( Y
page 115)D
Sets climate control to automatic ( Y
page 115)

Canada on ly
C
Sets the temperature, left ( Y
page 115)D
Sets climate control to automatic ( Y
page 115)

instructions. You will see the current settings
of the various climate control functions.
DYNAMIC SELECT button (except
Mercedes-AMG vehicles) You can choose between various drive programs
with the DYNAMIC SELECT button
( Y
page 127).
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 R
the rear window defroster running time is
reduced
Depending on the configuration, climate set-
tings may also be influenced in the drive pro-
gram I .
If you have selected drive program C or S , cli-
mate settings are not influenced.
ECO start/stop function During automatic engine switch-off, the climate
control system only operates at a reduced capa-
city. If you require the full climate control output,
you can switch off the ECO start/stop function
by pressing the ECO button ( Y
page 126).
Operating the climate control sys-
tems
Activating/deactivating climate con-
trol
General notes When the climate control is switched off, the air
supply and air circulation are also switched off.
The windows could fog up. Therefore, switch off
climate control only briefly
Air-conditioning system X
Turn the SmartKey to position 2 in the ignition
lock ( Y
page 121).X
To switch on: turn control

Problems with the "Cooling with air dehumidification" function Problem
Possible causes/consequences and P Solutions
The indicator lamp in the
Z button flashes
three times or remains
off. The "Cooling with air
dehumidification" func-
tion cannot be switched
on. Cooling with air dehumidification has been deactivated due to a mal-
function. X
Visit a qualified specialist workshop.
Setting climate control to automatic
General notes The automatic climate control function is only
available in conjunction with dual-zone auto-
matic climate control.
In automatic mode, the set temperature is main-
tained automatically at a constant level. The
system automatically regulates the temperature
of the dispensed air, the airflow and the air dis-
tribution.
The "Cooling with air dehumidification" function
is activated automatically in automatic mode.
Setting climate control to automatic X
Turn the SmartKey to position 2 in the ignition
lock ( Y
page 121).X
Set the desired temperature. X
To activate: press the X button.
The indicator lamp in the X button lights
up. Automatic air distribution and airflow are
activated. X
To switch to manual mode: press the O
or J button.
or X
Press the

i You can also activate several air distribution
settings simultaneously. To do this, press
multiple air distribution buttons. The air is
then directed through various vents.
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 air distribution X
Turn the SmartKey to position 2 in the ignition
lock ( Y
page 121).X
Press one or more of the

The climate control system switches to the
following functions: R
high airflow R
high temperature R
air distribution to the windshield and front
side windows R
air-recirculation mode off
i The "Windshield defrosting" function auto-
matically sets the blower output to the opti-
mum defrosting effect. As a result, the airflow
may increase or decrease automatically after
the d button is pressed.
i You can adjust the blower output manually
while the "Windshield defrosting" function is
in operation: R
Air-conditioning system: turn airflow con-
trol

If the battery voltage is too low, the rear window
defroster may switch off.
Activating/deactivating X
Turn the SmartKey to position 2 in the ignition
lock ( Y
page 121). X
Press the l button.
The indicator lamp in the l button lights
up or goes out.
Problems with the rear window defroster Problem
Possible causes/consequences and P Solutions
The rear window
defroster has deactiva-
ted prematurely or can-
not be activated. The battery has not been sufficiently charged. 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 defroster
can be activated again.
Switching air-recirculation mode
on/off
General notes You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle from
outside. The air already inside the vehicle will
then be recirculated.
If you switch on air-recirculation mode, the win-
dows can fog up more quickly, in particular at
low temperatures. Only use air-recirculation
mode briefly to prevent the windows from fog-
ging up.
The operation of air-recirculation mode is the
same for all control panels.
Activating/deactivating X
Turn the SmartKey to position 2 in the ignition
lock ( Y
page 121).X
To activate: press the