Page 289 of 536
The windshield wipers are inoperative
The windshield wiper drive is malfunctioning.
X
Select another wiper speed on the
combination switch.
X Have the windshield wipers checked at a
qualified specialist workshop.
The spray nozzles are misaligned The windshield washer fluid from the spray
nozzles no longer hits the center of the
windshield.
The spray nozzles are misaligned.
X Have the spray nozzles adjusted at a
qualified specialist workshop. Windshield wipers
287
Lights and windshield wipers Z
Page 290 of 536
Page 291 of 536
Useful information ............................
290
Overview of climate control sys-
tems ................................................... 290
Operating the climate control sys-
tem ..................................................... 292
Setting the air vents ......................... 298 289Climate control
Page 292 of 536

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific 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 Please read the information on qualified
specialist workshops (Y page 31). Overview of climate control systems
Important safety notes
G
WARNING
Severe conditions (e.g. strong air pollution)
may require replacement of the filter before
its
scheduled replacement interval. A clogged
filter will reduce the air volume to the interior
and the windows could fog up, impairing
visibility and endangering you and others.
Have a blocked filter replaced at a Mercedes-
Benz Center as soon as possible. G
WARNING
Follow the recommended settings for heating
and cooling given on the following pages.
Otherwise, the windows could fog up,
impairing visibility and endangering you and
others.
The automatic climate control controls the
temperature and the humidity in the vehicle
interior and filters undesirable substances
from the air.
The automatic climate control is only
operational when the engine is running 16
.
Optimum operation is only achieved if you
drive with the side windows and sliding
sunroof/panorama roof with power tilt/
sliding panel closed. You can also set some automatic climate
control
functions via COMAND (Y page 265).
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the
convenience opening feature ( Y page 93).
This will speed up the cooling process and
the desired vehicle interior temperature
will be reached more quickly.
i The integrated filter can filter out most
particles of dust and completely filters out
pollen. 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 Service Booklet. As it
depends on environmental conditions, e.g.
heavy air pollution, the interval may be
shorter than stated in the Service Booklet.
i It is possible that the blower may be
activated automatically 40 minutes after
the SmartKey is removed. The vehicle is
then ventilated for 30 minutes to dry the
air-conditioning system.
16 The residual heat function can only be activated/deactivated if the ignition is switched off.290
Overview of climate control systems
Climate control
Page 293 of 536

Automatic climate control panel
Front control panel
: Sets climate control to automatic mode, left (Y page 293)
; Sets the temperature, left ( Y page 294)
= Sets the airflow, left ( Y page 295)
? Defrosts the windshield ( Y page 296)
A Activates/deactivates air-recirculation mode (Y page 297)
B Switches climate control on /off( Y page 292)
C Switches the residual heat function on/off( Y page 298)
D Switches the rear window defroster on/off ( Y page 297)
E Sets the airflow, right ( Y page 295)
F Sets the temperature, right ( Y page 294)
G Sets climate control to automatic mode, right (Y page 293)
Rear control panel
H Sets the temperature, left ( Y page 294)
I Sets the air distribution, left (Y page 295)
J Sets the airflow ( Y page 295)
K OFF Switches rear-compartment climate control off (Y page 292)
AUTO Sets rear-compartment climate control to automatic mode
(Y page 293)
MAN Sets rear-compartment climate control to manual mode
(Y page 293)
L Sets the air distribution, right (Y page 295)
M Sets the temperature, right ( Y page 294) Overview of climate control systems
291
Climate control Z
Page 294 of 536

Notes on using climate control
Below, you can find a number of notes and
recommendations to help you use climate
control optimally.
R Activate climate control using the Ã
rocker switch. The indicator lamp in the
à rocker switch lights up.
R Set the temperature to
72 ‡ (22 †).
R Only use the "defrosting" function briefly
until the windshield is clear again.
R Only use "air-recirculation" mode briefly,
e.g. if there are unpleasant outside odors
or when in a tunnel. The windows could
otherwise fog up as, in air-recirculation
mode, no fresh air is drawn into the vehicle.
R Use the residual heat function if you want
to heat or ventilate the vehicle interior
when the ignition is switched off. The
"residual heat" function can only be
activated or deactivated with the ignition
switched off. Operating the climate control system
Activating/deactivating climate
control
Important information G
WARNING
When the climate control system is
deactivated, the outside air supply and
circulation are also deactivated. Only choose
this setting for a short time. Otherwise the
windows
could fog up, impairing visibility and
endangering you and others.
i Switch on climate control primarily using
the à rocker switch ( Y page 293).Switching the front climate control on/
off using the front control panel X
Turn the SmartKey to position 2 in the
ignition lock.
X To activate: press the ^ rocker switch
up or down.
The indicator lamp in the rocker switch
goes out. The previously selected settings
come into effect again.
X To deactivate: press the ^ rocker
switch up or down.
The indicator lamp in the rocker switch
lights up.
Switching the rear-compartment
climate control on/off using the front
control panel X
Turn the SmartKey to position 2 in the
ignition lock.
X Activate the Y rear compartment
function via COMAND ( Y page 268).
The rear-compartment climate control can
be controlled via the front control panel
using
the Y rear compartment function.
X To activate: press the ^ rocker switch
up or down.
The indicator lamp in the rocker switch
goes out. The previously selected settings
come into effect again.
X To deactivate: press the ^ rocker
switch up or down.
The indicator lamp in the rocker switch
lights up. 292
Operating the climate control system
Climate control
Page 295 of 536

Switching the rear-compartment
climate control on/off using the rear
control panel
X
Turn the SmartKey to position 2 in the
ignition lock.
X To switch on: press rocker switch
K(Y page 291) up or down and select
AUTO.
or
X Press rocker switch K(Y page 291) up or
down and select MAN.
X To switch off: press rocker switch
K(Y page 291) up or down and select
OFF. Activating/deactivating cooling with
the air dehumidification function
Important information The cooling with air dehumidification function
is only available when the engine is running.
The air inside the vehicle is cooled and
dehumidified according to the temperature
selected.
G
WARNING
If you switch off the cooling function, the
vehicle will not be cooled when weather
conditions
are warm. The windows can fog up
more quickly. Window fogging may impair
visibility and endanger you and others.
Condensation may drip from the underside of
the vehicle when it is in cooling mode. This is
normal and not a sign that there is a
malfunction.
You can activate or deactivate the cooling
with air dehumidification function via
COMAND (Y page 267).
i The cooling with air dehumidification
function uses refrigerant R134a. This
coolant does not contain
chlorofluorocarbons, and therefore does
not damage the ozone layer. Problems with the cooling with air
dehumidification function If you can no longer switch on the cooling with
air dehumidification function via COMAND,
the
cooling with air dehumidification function
is switched off due to a malfunction.
X Consult a qualified specialist workshop. Setting climate control to automatic
G
WARNING
If you switch off the cooling function, the
vehicle will not be cooled when weather
conditions
are warm. The windows can fog up
more quickly. Window fogging may impair
visibility and endanger you and others.
In automatic mode, the set temperature is
maintained automatically at a constant level.
The system automatically regulates the
temperature of the dispensed air, the airflow
and the air distribution.
Automatic mode will achieve optimal
operation if cooling with air dehumidification
is also activated. If desired, cooling with air
dehumidification can be deactivated.
Controlling the front climate control
using the front control panel X
Turn the SmartKey to position 2 in the
ignition lock.
X Set the desired temperature.
X To switch on: press the à rocker
switch up or down.
The indicator lamp in the à rocker
switch lights up. Operating the climate control system
293
Climate control Z
Page 296 of 536

X
To deactivate: press the K rocker
switch up or down.
The indicator lamp in the à rocker
switch goes out.
or
X Set the air distribution using COMAND
(Y page 266).
The indicator lamp in the à rocker
switch goes out.
Controlling the rear-compartment
climate control automatically using the
front control panel X
Turn the SmartKey to position 2 in the
ignition lock.
X Activate the Y rear compartment
function via COMAND ( Y page 268).
Rear-compartment climate control can be
controlled
via the front control panel using
the Y rear compartment function.
X Set the desired temperature.
X To switch on: press rocker switch Ã
up or down.
The indicator lamp in the à rocker
switch lights up.
X To deactivate: press the K rocker
switch up or down.
The indicator lamp in the à rocker
switch goes out.
or
X Set the air distribution using COMAND
(Y page 266).
The indicator lamp in the à rocker
switch goes out.
i To
return to the standard display, activate
the front climate control function via
COMAND (Y page 268).
i The rear display changes to the standard
display automatically after five seconds. Controlling the rear-compartment
climate
control automatically using the
rear control panel X
Turn the SmartKey to position 2 in the
ignition lock.
X Set the desired temperature.
X To activate: press
rocker switch K up or
down and select AUTO(Y page 291).
X To deactivate: press rocker switch K up
or down and select MAN or
OFF(Y page 291). Setting the temperature
Climate control climate zones
You
can select different temperature settings
for the driver's and front-passenger sides as
well as for the left and right sides of the rear
compartment and the footwells.
Setting the front-compartment
temperature using the front control
panel X
Turn the SmartKey to position 2 in the
ignition lock.
X To increase/reduce: press the w
rocker switch up or down.
Only change the temperature setting in
small increments. Start at
72 ‡ (22 †).
i You can also use COMAND to set the
temperature ( Y page 265).294
Operating the climate control system
Climate control