Page 121 of 390

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:
Rswitch off climate control only briefly
Rswitch on air-recirculation mode only briefly
Rswitch on the cooling with air dehumidifica-
tion function
Rswitch on the defrost windshield function
briefly, if required
Climate control regulates the temperature and
the humidity in the vehicle interior and filters
undesirable substances out of the air.
The "Cooling with air dehumidification" function
is only available when the engine is running.
Optimum climate control is only achieved with
the side windows and roof closed.
The residual heat function can only be activated
or deactivated with the ignition switched off
(
Ypage 128).
iVentilate the vehicle for a brief period during
warm weather, e.g. using the convenience
opening feature (
Ypage 86).
This will speed up the cooling process and the desired interior temperature will be reached
more quickly. If you start the engine using your smartphone,
the last selected climate control setting is reac-
tivated (
Ypage 134).
iThe 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.
iVehicles with AIR-BALANCE package: in
addition to ionization, the vehicle has an air
filter with anti-allergenic properties that con-
tribute to improved air filtration.
iIt 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 auto-
matic climate control. The vehicle is then ven-
tilated for 30 minutes.
iHybrid vehicles: observe the information
on climate control in the separate operating
instructions.
Overview of climate control systems119
Climate control
Page 122 of 390
Control panel for dual-zone automatic climate control
USAonly
Front control panel
:Sets the temperature, left (Ypage 125)
;Defrosts the windshield (Ypage 126)
=Switches the maximum cooling MAX COOL on or off (Ypage 127)
?Switches cooling with air dehumidification on/off (Ypage 124)
ASwitches the rear window defroster on/off (Ypage 127)
BSets the temperature, right (Ypage 125)
CSwitches air-recirculation mode on/off (Ypage 128)
DSets the air distribution (Ypage 126)
EIncreases the airflow (Ypage 126)
FReduces the airflow (Ypage 126)
GActivates/deactivates climate control (Ypage 124)
HSets climate control to automatic (Ypage 125)
120Overview of climate control systems
Climate control
Page 123 of 390
Canada only
Front control panel
:Sets the temperature, left (Ypage 125)
;Defrosts the windshield (Ypage 126)
=Switches the ZONE function on/off (Ypage 126)
?Switches cooling with air dehumidification on/off (Ypage 124)
Switches the residual heat on or off (
Ypage 128)
ASwitches the rear window defroster on/off (Ypage 127)
BSets the temperature, right (Ypage 125)
CSwitches air-recirculation mode on/off (Ypage 128)
DSets the air distribution (Ypage 126)
EIncreases the airflow (Ypage 126)
FReduces the airflow (Ypage 126)
GActivates/deactivates climate control (Ypage 124)
HSets climate control to automatic (Ypage 125)
Rear control panel
:Sets rear-compartment climate control to automatic
;Switches the rear climate control on/off
=Directs the air distribution through the rear air vents
?Switches the seat heating on the right-hand side on/off
Overview of climate control systems121
Climate control
Page 124 of 390

ADirects the air distribution through the footwell vents
BSwitches the seat heating on the left-hand side on/off
Control panel for 3-zone automatic climate control
USA only
Front control panel
:Sets the temperature, left (Ypage 125)
;Defrosts the windshield (Ypage 126)
=Switches the maximum cooling MAX COOL on or off (Ypage 127)
?Switches cooling with air dehumidification on/off (Ypage 124)
ASwitches the rear window defroster on/off (Ypage 127)
BSets the temperature, right (Ypage 125)
CSwitches the ZONE function on/off (Ypage 126)
DActivates/deactivates climate control (Ypage 124)
ESets the air distribution (Ypage 126)
FIncreases the airflow (Ypage 126)
GReduces the airflow (Ypage 126)
HDisplay
IAdjusts the climate mode settings (Ypage 125)
JSwitches air-recirculation mode on/off (Ypage 128)
KSets climate control to automatic (Ypage 125)
Rear control panel
LIncreases the airflow (Ypage 126)
MSets the temperature (Ypage 125)
NSets rear-compartment climate control to automatic (Ypage 125)
ODirects the airflow through the rear air vents (Ypage 126)
PSwitches the seat heating on the right-hand side on/off (Ypage 98)
QDirects the airflow through the footwell vents (Ypage 126)
RSwitches the rear climate control on/off (Ypage 124)
122Overview of climatecont rol systems
Climate control
Page 125 of 390

SReduces theairflow (Ypage 126)
TSwitches th eseat heating on th eleft-han dside on/off (Ypage 98)
Canadaonly
Front control panel
:Sets th etemperature, lef t (Ypage 125)
;Defroststh ewindshield (Ypage 126)
=Switches th eresidual heat on or off (Ypage 128)
?Switches coolingwit hair dehumidification on/off (Ypage 124)
ASwitches therear window defroste ron/off (Ypage 127)
BSets thetemperature, right (Ypage 125)
CSwitches theZON Efunction on/off (Ypage 126)
DActivates/deactivates climat econtrol (Ypage 124)
ESets theair distribution (Ypage 126)
FIncreasesth eairflow (Ypage 126)
GReduces th eairflow (Ypage 126)
HDisplay
IAdjusts th eclimat emod esetting s (Ypage 125)
JSwitches air-recirculation mod eon/off (Ypage 128)
KSets climat econtrol to automatic (Ypage 125)
Rea rcontrol panel
LIncrease sth eairflow (Ypage 126)
MSets thetemperature (Ypage 125)
NSets rear-compartmen tclimat econtrol to automatic (Ypage 125)
ODirects theairflow throug hth erear air vents (Ypage 126)
PSwitches theseat heating on th eright-hand side on/off (Ypage 98)
QDirects th eairflow throug hth efootwell vents (Ypage 126)
RSwitches therear climat econtrol on/off (Ypage 124)
SReduces theairflow (Ypage 126)
TSwitches th eseat heating on th eleft-han dside on/off (Ypage 98)
Overview of climate control systems123
Climate control
Page 126 of 390

Optimum use of automatic climate
control
Optimum use of the automatic climate
control
The following contains notes and recommenda-
tions on optimum use of the dual-zone or 3-zone
automatic climate control.
RYou can switch on climate control by using the
à and¿ orà andÁ buttons.
The indicator lamps in the Ãand
¿ buttons or the ÃandÁ buttons
light up.
RVehicles with 3-zone climate control: in
automatic mode, you can also use the
ñ button to set a climate mode (FOCUS/
MEDIUM/DIFFUSE). The MEDIUM level is
recommended.
RSet the temperature to 72 ‡ (22 †).
ROnly use the "Windshield defrosting" function
briefly until the windshield is clear again.
ROnly use air-recirculation mode briefly, e.g. if
there are unpleasant outside odors or when in
a tunnel. The windows could otherwise fog up,
since no fresh air is drawn into the vehicle in
air-recirculation mode.
RVehicles with 3-zone climate control: use
the ZONE function to adopt the temperature
settings on the driver's side for the front-
passenger side and the rear compartment as
well. The indicator lamp above the ábut-
ton goes out.
RVehicles with 3-zone climate control: use
the "residual heat" function if you want to heat
or ventilate the vehicle interior when the igni-
tion is switched off. The residual heat function
can only be activated or deactivated with the
ignition switched off.
RIf you change the settings of the climate con-
trol system, the climate status display
appears for approximately three seconds at
the bottom of the screen in the multimedia
system display. You will see the current set-
tings of the various climate control functions.
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 (
Ypage 137).
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
Activate climate control primarily using the
à button (
Ypage 125).
In the rear compartment, you can also switch
climate control on and off using the Ãand
^ buttons.
Activating/deactivating
XTurn the SmartKey to position 2in the ignition
lock (Ypage 132).
XTo switch on: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Airflow and air distribution are set to auto-
matic mode.
XTo deactivate: press the^button.
The indicator lamp in the ^button lights
up.
Switching cooling with air dehumidi-
fication on/off
Activating/deactivating
XTo activate: press the¿orÁ button.
The indicator lamp in the ¿orÁ button
lights up.
XTo deactivate: press the¿orÁ but-
ton.
The indicator lamp in the ¿orÁ button
goes out. The "Cooling with air dehumidifica-
tion" function has a delayed switch-off fea-
ture.
124Operating the climate control systems
Climate control
Page 127 of 390

Problems with the "Cooling with air dehumidification" function
ProblemPossible causes/consequences andMSolutions
The indicator lamp in the
¿orÁ button
flashes three times or
remains off. The "Cool-
ing with air dehumidifi-
cation" function cannot
be switched on.Cooling with air dehumidification has been deactivated due to a mal-
function.
XVisit a qualified specialist workshop.
Setting climate control to automatic
General notes
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.
In the rear compartment, you can also switch
climate control for the rear seats to automatic
mode using the Ãbutton.
Automatic control
XTurn the SmartKey to position 2in the ignition
lock (Ypage 132).
XSet the desired temperature.
XTo activate: press theÃbutton.
The indicator lamp in the Ãbutton lights
up. Automatic air distribution and airflow are
activated.
XTo switch to manual mode: press the_
button.
3-zone automatic climate control: when auto-
matic mode is activated, you can select a cli-
mate mode (
Ypage 125).
Adjusting the climate mode settings
You can select the following climate mode set-
tings in automatic mode:
FOCUS high airflow, slightly cooler setting
MEDIUM medium airflow, standard setting
DIFFUSE low airflow, slightly warmer and draft- free setting
XTurn the SmartKey to position 2in the ignition
lock (Ypage 132).
XPress the Ãbutton.
XPress the ñbutton repeatedly until the
desired climate mode appears in the display.
Setting the temperature
Dual-zone automatic climate control
Different temperatures can be set for the driv-
er's and front-passenger sides.
XTurn the SmartKey to position 2in the ignition
lock (Ypage 132).
XTo increase or decrease: turn control:or
B counter-clockwise or clockwise
(
Ypage 120).
Only change the temperature setting in small
increments. Start at 72 ‡ (22 †).
3-zone automatic climate control
You can select different temperature settings
for the driver's and front-passenger sides as well
as for the rear compartment.
XTurn the SmartKey to position 2in the ignition
lock (Ypage 132).
XTo increase or decrease temperature in
the front compartment: turn control:or
B counter-clockwise or clockwise
(
Ypage 122).
Only change the temperature setting in small increments. Start at 72 ‡ (22 †).
XTo increase or reduce the temperature in
the rear compartment using the front con-
trol panel:press the ábutton.
The indicator lamp in the ábutton goes
out.
Operating the climate control systems125
Climate control
Page 128 of 390

The temperature setting for the driver's side
is adopted for the rear compartment and the
front-passenger side.
XTurn thumbwheel:to the left or right
(Ypage 122).
Only change the temperature setting in small
increments. Start at 72 ‡ (22 †).
XTo increase or decrease the rear compart- ment temperature using the rear control
panel: turn control Mcounter-clockwise or
clockwise on the rear control panel
(
Ypage 122).
Only change the temperature setting in small
increments. Start at 72 ‡ (22 †).
Setting the air distribution
Air distribution settings
Front control panel
P Directs the airflow through the center
vents
O Directs air through the footwell air vents
S Directs the airflow through the center
and footwell vents
¯ Directs air through the defroster vents
b Directs the airflow through the defroster
and center vents (Canada only)
a Directs air through the defroster and
footwell vents
_ Directs the airflow through the defroster,
center and footwell air vents (Canada
only)
Rear control panel
M Directs the airflow through the rear cen-
ter and B-pillar air vents
O Directs air through the footwell air vents
iUsing the rear control panel, you can also
activate both air distribution positions simul-
taneously. In order to do this, press both air
distribution buttons. The air is then routed
through all rear air vents.
iRegardless of the air distribution setting,
airflow is always directed through the side air
vents. The side air vents can only be closed
when the controls on the side air vents are
turned downwards.
Adjusting
XTurn the SmartKey to position 2in the ignition
lock (Ypage 132).
XPress the _button repeatedly until the
desired symbol appears in the display.
Setting the airflow
XTurn the SmartKey to position 2in the ignition
lock (Ypage 132).
XTo increase: press theKbutton.
XTo reduce: press theIbutton.
iYou can use 3-zone automatic climate con-
trol to set the airflow in the rear compartment
separately.
Switching the ZONE function on/off
XTo activate: press theábutton.
The indicator lamp above the ábutton
lights up.
Dual-zone automatic climate control: the tem-
perature setting for the driver's side is not
adopted for the front-passenger side.
3-zone automatic climate control: the tem-
perature setting for the driver's side is not
adopted for the front-passenger side and the rear compartment.
XTo deactivate: press theábutton.
The indicator lamp above the ábutton
goes out.
Dual-zone automatic climate control: the tem-
perature setting for the driver's side is adop-
ted for the front-passenger side.
3-zone automatic climate control: the tem-
perature setting for the driver's side is adop-
ted for the front-passenger side and the rear
compartment.
Defrosting the windshield
General notes
You can use this function to defrost the wind-
shield or to clear a fogged up windshield or front
side windows on the inside.
Switch off the "Windshield defrosting" function
as soon as the windshield is clear again.
126Operating the climate control systems
Climate control