Page 128 of 450
Useful information
i This Operator's Manual describes all models
and all standard and optional equipment of
your vehicle available at the time of publica-
tion of the Operator's Manual. Country-spe-
cific differences are possible. Please note
that your vehicle may not be equipped with all
features described. This also applies to
safety-related systems and functions.
i Read the information on qualified specialist
workshops ( Y
page 29).
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
Climate control regulates the temperature and
the humidity in the vehicle interior and filters
undesirable substances out of the air.
For vehicles with a combustion engine, the
"Cooling with air dehumidification" function is
only available when the engine is running. For
hybrid vehicles, the "Cooling with air dehumidi-
fication" function is also available via the elec-
tric refrigerant compressor when the engine is
not 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
( Y
page 138).
i Ventilate the vehicle for a brief period during
warm weather, e.g. using the convenience
opening feature ( Y
page 92).
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 ( Y
page 148). 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 Vehicles with AIR-BALANCE package: in
addition to ionization, t he vehicle has an air
filt
er with anti-allergenic properties that con-
tribute to improved air filtration.
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 auto-
matic climate control. The vehicle is then ven-
tilated for 30 minutes.126
Overview of climate control systems
Climate control
Page 129 of 450
Control panel for dual-zone automatic climate control
US A only
Front control panel C
Sets the temperature, left ( Y
page 134) D
Defrosts the windshield ( Y
page 136)
Page 132 of 450
Control panel for 3-zone automatic climate control
US A only
Front control panel C
Sets the temperature, left ( Y
page 134) D
Defrosts the windshield ( Y
page 136)
Page 134 of 450
Optimum use of 3-zone automatic cli-
mate control The following contains instructions and recom-
mendations to enable you to get the most out of
your 3-zone automatic climate control. R
Activate climate control using the X and
Z buttons. The indicator lamps above the
X and Z buttons light up.R
In automatic mode, you can also use the
Page 135 of 450
Condensation may drip from the undersi de of
the veh icle when it is in co olin g mode. This is
normal and not a sign that there is a malfunc-
tion.
Switching on/off X
To activate: press the Z or V button.
The indicator lamp in the Z or V button
lights up. X
To deactivate: press the Z or V but-
ton.
The indicator lamp in the Z or V button
goes out. The "Coolin g wit h air dehum idif ica-
tion" function has a delayed swit ch-off fea-
ture. Operating the climate control systems 133
Climate control
Page 136 of 450
Problems with the "Cooling with air dehumidification" function Problem
Possible causes/consequences and P Solutions
The indicator lamp in the
Z or V 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. X
Visit 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 X button.
Automatic control X
Turn the SmartKey to position 2 in the ignition
lock ( Y
page 145).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
Page 137 of 450
3-zone automatic climate control
3-zone automatic climate control zones
You can select different temperature settings
for the driver's and front-passenger sides as well
as for the rear compartment. X
Turn the SmartKey to position 2 in the ignition
lock ( Y
page 145).X
To increase or decrease temperature in
the front compartment: turn control C or
Page 141 of 450
The ionization of the interior air is odorless and
cannot be perceived directly in the vehicle inte-
rior.
You can switch ionization on and off via the mul-
timedia system (see the separate operating
instructions).
Ionization can only be operated when the auto-
matic climate control is switched on. The side air
vent on the driver's side must be open.
Pre-entry climate control via Smart-
Key
General notes The "Pre-entry climate control via SmartKey"
function is only available in PLUG-IN HYBRID
vehicles.
Before getting in, the vehicle interior can be
briefly warmed or ventilated in advance and the
air from the air vents can be pre-cooled.
The high-voltage battery must be sufficiently
charged before "Pre-entry climate control via
SmartKey" can be activated.
When the vehicle is pre-cooled, the following
functions are activated if required: R
Climate control system R
Blower R
Seat ventilation
When the vehicle is pre-heated, the following
functions are activated if required: R
Climate control system R
Blower R
Seat heating
If you have activated ionization via the multime-
dia system, it is activated together with pre-
entry climate control.
Switch on ionization (see the separate operating
instructions).
Activating or deactivating "Pre-entry
climate control via SmartKey"
Before "Pre-entry climate control via SmartKey"
can be activated, you must activate the function
using the on-board computer. X
To activate pre-entry climate control via
SmartKey: unlock the vehicle with the Smart-
Key or KEYLESS-GO. The climate control functions are activated for
up to 5 minutes for pre-heating and pre-cooling.
To deactivate "Pre-entry climate control via
SmartKey": "Pre-entry climate control via
SmartKey" switches off automatically when the
engine is started.
The following functions remain active after the
engine is started: R
Seat heating (heating) R
Seat ventilation (ventilation) R
Ionization
An activated "Pre-entry climate control via
SmartKey" function can be deactivated via the
button ( Y
page 141).Operating the climate control systems 139
Climate control
