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 131).
iVentilate the vehicle for a brief period during
warm weather, e.g. using the convenience
opening feature (
Ypage 89). This will speed
up the cooling process and the desired inte-
rior temperature will be reached more
quickly. If you start the engine using your smartphone,
the last selected climate control setting is reac-
tivated (
Ypage 137).
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.
Depending on the operating conditions and
environmental influences, the interval for
replacing the filter may be shorter than speci-
fied.
iVehicles with ionization of the interior
air and air filter: in addition to ionization, the
vehicle has an air filter with anti-allergenic
properties that contribute to improved air fil-
tration.
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.
iPlug-in hybrid vehicles: observe the notes
on climate control in the separate Operator's
Manual.
122Overview of climate control systems
Climate control
Control panel for dual-zone automatic climate control
USA only
Front control panel
:Sets the temperature, left (Ypage 128)
;Defrosts the windshield (Ypage 129)
=Switches the maximum cooling MAX COOL on or off (Ypage 130)
?Switches cooling with air dehumidification on/off (Ypage 127)
ASwitches the rear window defroster on/off (Ypage 130)
BSets the temperature, right (Ypage 128)
CSwitches air-recirculation mode on/off (Ypage 131)
DSets the air distribution (Ypage 129)
EIncreases the airflow (Ypage 129)
FReduces the airflow (Ypage 129)
GActivates/deactivates climate control (Ypage 127)
HSets climate control to automatic (Ypage 128)
Rear control panel
ISets rear-compartment climate control to automatic (Ypage 128)
JDirects the air distribution through the rear air vents (Ypage 129)
KSwitches the seat heating on the right-hand side on/off (Ypage 101)
LDirects the air distribution through the footwell vents (Ypage 129)
MSwitches the rear climate control on/off (Ypage 127)
NSwitches the seat heating on the left-hand side on/off (Ypage 101)
Overview of climate control systems123
Climate control
Canada only
Front control panel
:Sets the temperature, left (Ypage 128)
;Defrosts the windshield (Ypage 129)
=Switches the ZONE function on/off (Ypage 129)
?Switches co olingwit h air dehumidif ication on/off (Ypage 127)
Swit ches the residual heat on or off (
Ypage 131)
ASwitches the rear window defroster on/off (Ypage 130)
BSets the temperature, right (Ypage 128)
CSwitches air-recirculation mode on/off (Ypage 131)
DSets the air distribution (Ypage 129)
EIncreases the airflow (Ypage 129)
FReduces the airflow (Ypage 129)
GActivates/deactivates climate control (Ypage 127)
HSets climate control to automat ic(Ypage 128)
Rear control panel
ISets rear-compartment climate control to automatic (Ypage 128)
JDirects the air distribution through the rear air vents (Ypage 129)
KSwit ches the seat heating on the right-hand sideon/off (Ypage 101)
LDirects the air distribution through the footwe llvents (Ypage 129)
MSwit ches the rear climate control on/off (Ypage 127)
NSwit ches the seat heating on the left-hand sideon/off (Ypage 101)
124Overview of climate control systems
Climate control
Control panel for 3-zone automatic climate control
USAonly
Front control panel
:Sets the temperature, left (Ypage 128)
;Defrosts the windshield (Ypage 129)
=Switches the maximum cooling MAX COOL on or off (Ypage 130)
?Switches cooling with air dehumidification on/off (Ypage 127)
ASwitches the rear window defroster on/off (Ypage 130)
BSets the temperature, right (Ypage 128)
CSwitches the ZONE function on/off (Ypage 129)
DActivates/deactivates climate control (Ypage 127)
ESets the air distribution (Ypage 129)
FIncreases the airflow (Ypage 129)
GReduces the airflow (Ypage 129)
HDisplay
IAdjusts the climate mode settings (Ypage 128)
JSwitches air-recirculation mode on/off (Ypage 131)
KSets climate control to automatic (Ypage 128)
Rear control panel
LIncreases the airflow (Ypage 129)
MSets the temperature (Ypage 128)
NSets rear-compartment climate control to automatic (Ypage 128)
ODirects the airflow through the rear air vents (Ypage 129)
PSwitches the seat heating on the right-hand side on/off (Ypage 101)
QDirects the airflow through the footwell vents (Ypage 129)
RSwitches the rear climate control on/off (Ypage 127)
SReduces the airflow (Ypage 129)
TSwitches the seat heating on the left-hand side on/off (Ypage 101)
Overview of climate control systems125
Climate control
Canada only
Front control panel
:Sets the temperature, left (Ypage 128)
;Defrosts the windshield (Ypage 129)
=Switches the residual heat on or off (Ypage 131)
?Switches cooling with air dehumidification on/off (Ypage 127)
ASwitches the rear window defroster on/off (Ypage 130)
BSets the temperature, right (Ypage 128)
CSwitches the ZONE function on/off (Ypage 129)
DActivates/deactivates climate control (Ypage 127)
ESets the air distribution (Ypage 129)
FIncreases the airflow (Ypage 129)
GReduces the airflow (Ypage 129)
HDisplay
IAdjusts the climate mode settings (Ypage 128)
JSwitches air-recirculation mode on/off (Ypage 131)
KSets climate control to automatic (Ypage 128)
Rear control panel
LIncreases the airflow (Ypage 129)
MSets the temperature (Ypage 128)
NSets rear-compartment climate control to automatic (Ypage 128)
ODirects the airflow through the rear air vents (Ypage 129)
PSwitches the seat heating on the right-hand side on/off (Ypage 101)
QDirects the airflow through the footwell vents (Ypage 129)
RSwitches the rear climate control on/off (Ypage 127)
SReduces the airflow (Ypage 129)
TSwitches the seat heating on the left-hand side on/off (Ypage 101)
126Overview of climate control systems
Climate control
Optimum use of automatic climate
control
The following contains notes and recommenda-
tions on optimum use of the dual-zone auto-
matic climate control or 3-zone automatic cli-
mate control.
RYou can switch on climate control by using the
Ãand¿ orà andÁ buttons.
The indicator lamps in the Ãand
¿ buttons or the ÃandÁ buttons
light up.
RVehicles with 3-zone automatic 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 automatic climate
control: use the ZONE function to adopt the
temperature settings on the driver's side for
the front-passenger side and the rear com-
partment as well. The indicator lamp above
the á button goes out.
RVehicles with 3-zone automatic climate
control: use the "residual heat" function if
you want to heat or ventilate the vehicle inte- rior when the ignition 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 140).
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 128).
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 igni-
tion lock (Ypage 135).
XTo activate: 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.
Operating the climate control systems127
Climate control
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 igni-
tion lock (Ypage 135).
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 128).
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 igni-
tion lock (Ypage 135).
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 igni-
tion lock (Ypage 135).
XTo increase or decrease: turn control:or
B counter-clockwise or clockwise
(
Ypage 123).
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 igni-
tion lock (Ypage 135).
XTo increase or decrease temperature in
the front compartment: turn control:or
B counter-clockwise or clockwise
(
Ypage 125).
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 theábutton.
The indicator lamp in the ábutton goes
out.
128Operating the climate control systems
Climate control
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 125).
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 125).
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.
Setting
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 135).
XPress the _button repeatedly until the
desired symbol appears in the display.
Setting the airflow
XTurn the SmartKey to position 2in the igni-
tion lock (Ypage 135).
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.
Operating the climate control systems129
Climate control