2013 MERCEDES-BENZ M-Class climate control

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 Read the information on qualified
specialist workshops: (Y page 27).Overview of climate control systems
Important safety notes
Observe the settings recommended on the
following pages. The windows could
otherwise fog up.
To preven tthe 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
dehumidification 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.
Climate control is only operational when the
engine is running. The system only works
optimally when the side windows and the roof
are closed.
The residual heat function can only be
activated or deactivated with the ignition
switched off (Y page 150).
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. Aclogged 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
Booklet.
i It is possible that the dehumidification
function of the climate control system may
be activated automatically an hour after the
SmartKey has been removed. The vehicle
is ventilated for 30 minutes. 138
Overview of climate control systemsClimate control

Control panel for dual-zone automatic climate control
USA only
Fron tcontrol panel
0002 To set the temperature, left (Y page 146)
0003 To defrost the windshield (Y page 148)
001F To switch maximum cooling on/off (Y page 148)
001E To switch cooling with air dehumidificatio non/off (Y page 145)
001C To switch the rea rwindow defroster on/off (Y page 149)
001D To set the temperature, right (Y page 146)
0011 To activate/deactivate air-recirculation mode (Y page 150)
0012 To set the air distribution (Y page 147)
0013 To increase the airflow (Y page 147)
0014 To reduce the airflow (Y page 147)
0015 To switch climate control on/off (Y page 144)
0016 To set climate control to automatic (Y page 145) Overview of climate control systems
139Climate control

Canada only
Fron tcontrol panel
0002 To set the temperature, left (Y page 146)
0003 To defrost the windshield (Y page 148)
001F To switch the ZONE function on/off (Y page 148)
001E To activate/deactivate cooling with air dehumidificatio n(Ypage 145) or activates/
deactivates the residual heatin gfunction ( Ypage 150)
001C To switch the rear window defroste ron/off (Y page 149)
001D To set the temperature, right (Y page 146)
0011 To activate/deactivate air-recirculation mode (Y page 150)
0012 To set the ai rdistribution (Y page 147)
0013 To increase the airflow (Y page 147)
0014 To reduce the airflow (Y page 147)
0015 To switch climate control on/off (Y page 144)
0016 To set climate control to automatic (Y page 145)Rear control panel
0002 To set rear-compartment climate control to automatic
0003 To switch rear-compartment climate control on/off 140
Overview of climate control systemsClimate control

001F
To direct the airflow through the rear air vents
001E To direct the airflow through the footwell vents Information about using dual-zone
automatic climate control
The following contains notes and
recommendations on optimum use of dual-
zone automatic climate control.
R Activate climate control using the 0006and
0007/0005 buttons. The indicator lamps in
the 0006 and0007/0005 buttons light 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, since no fresh air is drawn
into the vehicle in air-recirculation mode.
R Use the ZONE function to adopt the
temperature settings on the driver's side
for the front-passenger side as well. The
indicator lamp above the 0004button goes
out.
i During automatic engine switch-off, the
ECO start/stop function only operates at a
reduced capacity. If you require the full
climate control output, you can switch off
the ECO start/stop function by pressing
the ECO button (Y page 163). Overview of climate control systems
141Climate control

Control panel for 3-zone automatic climate control
USA only
Fron tcontrol panel
0002 To set the temperature, left (Y page 146)
0003 To defrost the windshield (Y page 148)
001F To switch maximum cooling on/off (Y page 148)
001E To switch cooling with air dehumidificatio non/off (Y page 145)
001C To switch the rea rwindow defroster on/off (Y page 149)
001D To set the temperature, right (Y page 146)
0011 To switch the ZONE function on/off (Y page 148)
0012 To switch climate control on/off (Y page 144)
0013 To set the air distribution (Y page 147)
0014 To increase the airflow (Y page 147)
0015 To reduce the airflow (Y page 147)
0016 Display
0017 To adjust the climate mode settings (Y page 146)
0018 To activate/deactivate air-recirculation mode (Y page 150)
0019 To set climate control to automatic (Y page 145)
Rear control panel
001A To increase the airflow (Y page 147)
001B To set the temperature (Y page 146)
0021 To set rear-compartment climate control to automatic (Y page 145)
0022 To direc tthe airflow through the rear air vents (Y page 147)
0023 To direct the airflow through the footwell vents (Y page 147)142
Overview of climate control systemsClimate control

0024
To switch rear-compartment climate control on/off (Y page 144)
0025 To reduce the airflow (Y page 147)Canada only
Front control panel
0002 To set the temperature, left (Y page 146)
0003 To defrost the windshield (Y page 148)
001F To switch the ZONE function on/off (Y page 148)
001E To activate/deactivate cooling with air dehumidification (Y page 145) or activate/
deactivate the residual heating function (Y page 150)
001C To switch the rear window defroster on/of f(Ypage 149)
001D To set the temperature, right (Y page 146)
0011 To switch rear-compartment climate control on/off
0012 To switch climate control on/off (Y page 144)
0013 To set the air distribution (Y page 147)
0014 To increase the airflow (Y page 147)
0015 To reduce the airflow (Y page 147)
0016 Display
0017 To adjust the climate mode settings (Y page 146)
0018 To activate/deactivate air-recirculation mode (Y page 150)
0019 To set climate control to automatic (Y page 145)
Rear control panel
001A To increase the airflow (Y page 147)
001B To set the temperature (Y page 146)
0021 To set rear-compartment climate control to automatic (Y page 145)
0022 To direct the airflow through the rear air vents (Y page 147) Overview of climate control systems
143Climate control

0023
To direct the airflow through the footwell vents (Y page 147)
0024 To switch rear-compartment climate control on/off (Y page 144)
0025 To reduce the airflow (Y page 147)Information about using 3-zone
automatic climate control
The following contains instructions and
recommendations to enable you to get the
most out of your automatic climate control.
R Activate climate control using the 0006and
0007 buttons. The indicator lamps above
the 0006 and0007 buttons light up.
R In automatic mode, you can also use the
000C button to set a climate mode
(FOCUS/MEDIUM/DIFFUSE). The
MEDIUM level is recommended.
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, since no fresh air is drawn
into the vehicle in air-recirculation mode.
R 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 0004button goes out.
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.
i During automatic engine switch-off, the
ECO start/stop function only operates at a
reduced capacity. If you require the full
climate control output, you can switch off
the ECO start/stop function by pressing
the ECO button (Y page 163). Operating the climate control
systems
Switching climate control on/off
Points to observe before use When the climate control is switched off, the
air supply and air circulation are also
switched off. Only use this setting for a brief
period. The windows could otherwise fog up.
Only switch off climate control briefly to
prevent the windows from fogging up.
i
Switch on climate control primarily using
the 0006 button (Y page 145).
In the rear compartment, you can also switch
climate control on and off using the 0006and
000C buttons.
Activating/deactivating X
Turn the SmartKey to position 2in the
ignition lock (Y page 157).
X To activate: press the0006button.
The indicator lamp in the 0006button lights
up. Airflow and air distribution are set to
automatic mode.
or
X Press the 000Cbutton.
The indicator lamp in the 000Cbutton goes
out. The previously selected settings are
restored.
X To deactivate: press the000Cbutton.
The indicator lamp in the 000Cbutton lights
up. 144
Operating the climate control systemsClimate control

Activating/deactivating cooling with
air dehumidification
Points to observe before use If you switch off the cooling function, the
vehicle will no tbe cooled when weather
conditions are warm. The windows can fog up
more quickly. Only deactivate the cooling
with air dehumidification function for a short
time to preven tthe windows from fogging up.
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.
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.
Activating/deactivating Example:
0007button
X To activate: press the0007/0005 button.
The indicator lamp in the 0007/0005
button lights up.
X To deactivate: press the0007/0005
button.
The indicator lamp in the 0007/0005
button goes out. The cooling with air
dehumidification function has a delayed
switch-off feature. Problems with the "cooling with air
dehumidification" function When you press the
0007button, the
indicator lamp in the button flashes three
times or remains off. You can no longer switch
on the cooling with air dehumidification
function.
X Visit a qualified specialist workshop. Setting climate control to automatic
Points to observe before use 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. Only deactivate the cooling
with air dehumidification function for a short
time to prevent the windows from fogging up.
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 necessary, cooling with air
dehumidification can be deactivated.
In the rear compartment, you can also switch
climate control for the rear seats to automatic
mode using the 0006button.
Activating/deactivating Operating the climate control systems
145Climate control