2015 MERCEDES-BENZ M-Class climate settings

Useful information
i This Operator's Manual describes all
models and all standard and optional equip- ment 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 special-
ist workshops (Y page 29). Overview of climate control systems
General notes
Observe the settings recommended on the
following pages. The windows could other-
wise 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 dehumidifi-
cation 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 can only be operated when
the engine is running. Optimum operation is
only achieved with the side windows and roof closed.
The residual heat function can only be acti-
vated or deactivated with the ignition
switched off (Y page 151).
i Ventilate the vehicle for a brief period
during warm weather, e.g. using the con-
venience opening feature (Y page 95).
This will speed up the cooling process and
the desired interior temperature will be
reached more quickly. i
The integrated filter filters out most par-
ticles of dust and soot and completely fil-
ters out pollen. It also reduces gaseous pol-
lutants and odors. A clogged filter reduces the amount of air supplied to the vehicle
interior. For this reason, you should alwaysobserve 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 residual heat func-
tion may be activated automatically an hour
after the SmartKey has been removed in
order to dry the air-conditioning system.
The vehicle is then ventilated for 30
minutes. 138
Overview of climate control systemsClimate control

0087
To direct the airflow through the rear air vents
0085 To direct the airflow through the footwell vents Optimum use of dual-zone automatic
climate control
The following contains notes and recommen-
dations on optimum use of the dual-zone
automatic climate control.
R Activate climate control using the 0058and
005A/0056 buttons. The indicator lamps in
the 0058 and005A/0056 buttons light up.
R Set the temperature to 72 ‡ (22 †).
R Only use the "Windshield defrosting" func-
tion 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 oth-
erwise fog up, since no fresh air is drawn
into the vehicle in air-recirculation mode.
R Use the ZONE function to adopt the tem-
perature settings on the driver's side for
the front-passenger side as well. The indi-
cator lamp above the 00D6button goes
out.
R Vehicles with COMAND: if you change the
settings of the climate control system, the
climate status display appears for approx-
imately three seconds at the bottom of the
screen in the COMAND display. See also
the separate COMAND operating instruc-
tions. You will see the current settings of
the various climate control functions.
During automatic engine switch-off, the cli-
mate control system only operates at a
reduced capacity. If you require the full cli-
mate 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
Front control panel
0043 To set the temperature, left (Y page 147)
0044 To defrost the windshield (Y page 149)
0087 To switch maximum cooling on/off (Y page 149)
0085 To switch cooling with air dehumidification on/off (Y page 144)
0083 To switch the rear window defroster on/off (Y page 150)
0084 To set the temperature, right (Y page 147)
006B To switch the ZONE function on/off (Y page 149)
006C To switch climate control on/off (Y page 144)
006D To set the air distribution (Y page 148)
006E To increase the airflow (Y page 148)
006F To reduce the airflow (Y page 148)
0070 Display
0071 To adjust the climate mode settings (Y page 147)
0072 To activate/deactivate air-recirculation mode (Y page 151)
0073 To set climate control to automatic (Y page 146)
Rear control panel
0074 To increase the airflow (Y page 148)
0075 To set the temperature (Y page 147)
0076 To set rear-compartment climate control to automatic (Y page 146)
0077 To direct the airflow through the rear air vents (Y page 148)
0078 To direct the airflow through the footwell vents (Y page 148)
0079 To switch rear-compartment climate control on/off (Y page 144)
007A To reduce the airflow (Y page 148)142
Overview of climate control systemsClimate control

Canada only
Front control panel
0043 To set the temperature, left (Y page 147)
0044 To defrost the windshield (Y page 149)
0087 To switch the residual heat function on/off (Y page 151)
0085 To switch cooling with air dehumidification on/off (Y page 144)
0083 To switch the rear window defroster on/off (Y page 150)
0084 To set the temperature, right (Y page 147)
006B To switch the ZONE function on/off (Y page 149)
006C To switch climate control on/off (Y page 144)
006D To set the air distribution (Y page 148)
006E To increase the airflow (Y page 148)
006F To reduce the airflow (Y page 148)
0070 Display
0071 To adjust the climate mode settings (Y page 147)
0072 To activate/deactivate air-recirculation mode (Y page 151)
0073 To set climate control to automatic (Y page 146)
Rear control panel
0074 To increase the airflow (Y page 148)
0075 To set the temperature (Y page 147)
0076 To set rear-compartment climate control to automatic (Y page 146)
0077 To direct the airflow through the rear air vents (Y page 148)
0078 To direct the airflow through the footwell vents (Y page 148)
0079 To switch rear-compartment climate control on/off (Y page 144)
007A To reduce the airflow (Y page 148) Overview of climate control systems
143Climate control

Optimum use of 3-zone automatic cli-
mate control
The following contains instructions and rec-
ommendations to enable you to get the most
out of your 3-zone automatic climate control.
R Activate climate control using the 0058and
005A buttons. The indicator lamps above
the 0058 and005A buttons light up.
R In automatic mode, you can also use the
00F0 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 "Windshield defrosting" func-
tion 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 oth-
erwise fog up, since no fresh air is drawn
into the vehicle in air-recirculation mode.
R Use the ZONE function to adopt the tem-
perature settings on the driver's side for
the front-passenger side and the rear com- partment as well. The indicator lamp above
the 00D6 button 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 deac- tivated with the ignition switched off.
R Vehicles with COMAND: if you change the
settings of the climate control system, the
climate status display appears for approx-
imately three seconds at the bottom of the
screen in the COMAND display. See also
the separate COMAND operating instruc-
tions. You will see the current settings of
the various climate control functions.
During automatic engine switch-off, the cli-
mate control system only operates at a
reduced capacity. If you require the full cli-
mate control output, you can switch off the
ECO start/stop function by pressing the ECO button (Y page 163). Operating the climate control sys-
tems
Switching climate control on/off
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
i Switch on climate control primarily using
the 0058 button (Y page 146).
In the rear compartment, you can also switch
climate control on and off using the 0058and
0078 buttons.
Activating/deactivating X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X To activate: press the0058button.
The indicator lamp in the 0058button lights
up. Airflow and air distribution are set to
automatic mode.
or
X Press the 0078button.
The indicator lamp in the 0078button goes
out. The previously selected settings are
restored.
X To deactivate: press the0078button.
The indicator lamp in the 0078button lights
up. Activating/deactivating cooling with
air dehumidification
General notes If you deactivate the "Cooling with air-dehu-
midification" function, the air inside the vehi-
cle will not be cooled. The air inside the vehi-
cle will also not be dehumidified. The win-
dows can fog up more quickly. Therefore, only deactivate the "Cooling with air-dehumidifi-
cation" function briefly. 144
Operating the climate control systemsClimate control

Adjusting the climate mode settings
You can select the following climate mode
settings in automatic mode:
FOCUS high airflow that is set slightly cooler
MEDIUM medium airflow, standard setting
DIFFUS Elow airflow that is set slightly
warmer and with less draft X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X Press the 0058button.
X Press the 00F0button repeatedly until the
desired climate mode appears in the dis-
play. Setting the temperature
Dual-zone automatic climate control Different temperatures can be set for the
driver's and front-passenger sides.
X Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X To increase/reduce: turn control0043or0084
clockwise or counter-clockwise
(Y page 139).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †). 3-zone automatic climate control
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 2in the igni-
tion lock (Y page 157).
X To increase/reduce the temperature in
the front: turn control 0043or0084 clockwise
or counter-clockwise (Y page 142).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
X To increase/reduce the temperature in
the rear compartment using the front
control panel: press the00D6button.
The indicator lamp in the 00D6button goes
out.
X Turn control 0043clockwise or counter-
clockwise (Y page 142).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †).
The temperature setting for the driver's
side is adopted for the rear compartment
and the front-passenger side.
X To increase/decrease the rear compart-
ment temperature using the rear con-
trol panel: turn control 0075clockwise or
counter-clockwise on the rear control
panel (Y page 142).
Only change the temperature setting in
small increments. Start at 72 ‡ (22 †). Operating the climate control systems
147Climate control

Setting the air distribution
Air distribution settings Front control panel
009C
Directs the airflow through the center
vents
009B Directs air through the footwell air
vents
009F Directs the airflow through the center
and footwell vents
0061 Directs air through the defroster vents
0087 Directs the airflow through the
defroster and center vents (Canada
only)
0086 Directs air through the defroster and
footwell vents
008F Directs the airflow through the
defroster, center and footwell air vents
(Canada only)
Rear control panel
0099 Directs the airflow through the rear
center and rear side air vents
009B Directs air through the footwell air
vents
i Using the rear control panel, you can also
activate both air distribution positions
simultaneously. In order to do this, press
both air distribution buttons. The air is then routed through all rear air vents.
i Regardless 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 X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X Press the 008Fbutton repeatedly until the
desired symbol appears in the display. Setting the airflow
X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X To increase: press the0097button.
X To reduce: press the0095button.
i You can use 3-zone automatic climate
control to set the airflow in the rear com-
partment separately. 148
Operating the climate control systemsClimate control

Switching the ZONE function on/off
X
To switch on: press the00D6button.
The indicator lamp above the 00D6button
lights up.
Dual-zone automatic climate control: the
temperature 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.
X To switch off: press the00D6button.
The indicator lamp above the 00D6button
goes out.
Dual-zone automatic climate control: the
temperature setting for the driver's side is
adopted for the front-passenger side.
3-zone automatic climate control: the tem- perature setting for the driver's side is
adopted 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 defrost the inside of the wind-
shield and the side windows.
Switch off the "Windshield defrosting" func-
tion as soon as the windshield is clear again. Switching on/off X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X To activate: press the0064button.
The indicator lamp in the 0064button lights
up.
The climate control system switches to the
following functions:
R high airflow
R high temperature
R air distribution to the windshield and
front side windows
R air-recirculation mode off
X To deactivate: press the0064button.
The indicator lamp in the 0064button goes
out. The previously selected settings are
restored. Air-recirculation mode remains
deactivated.
or X Press the 0058button.
The indicator lamp in the 0064button goes
out. Airflow and air distribution are set to
automatic mode.
or
X Turn controls 0043or0084 clockwise or coun-
ter-clockwise:
Dual-zone climate control (Y page 139)
3-zone automatic climate control
(Y page 142)
or
X Press the 0097or0095 button. MAX COOL maximum cooling
The MAX COOL function is only available in
vehicles for the USA. Operating the climate control systems
149Climate control