2015 MERCEDES-BENZ M-Class cooling

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

The "Cooling with air dehumidification" func-
tion is only available when the engine is run-
ning. 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 malfunc- tion.
Activating/deactivating Example:
005Abutton
X To activate: press the005A/0056 button.
The indicator lamp in the 005A/0056but-
ton lights up.
X To deactivate: press the005A/0056 but-
ton.
The indicator lamp in the 005A/0056but-
ton goes out. The "Cooling with air dehu-
midification" function has a delayed switch-
off feature. Operating the climate control systems
145Climate control

Problems with the "Cooling with air dehumidification" function
Problem
Possible causes/consequences and
0050
0050Solutions The indicator lamp in
the
005A/0056 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
malfunction.
X Visit a qualified specialist workshop. Setting climate control to automatic
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.
In automatic mode, the set temperature is
maintained automatically at a constant level.The system automatically regulates the tem-
perature of the dispensed air, the airflow and
the air distribution.
Automatic mode will achieve optimal opera-
tion if cooling with air dehumidification is also
activated. If necessary, cooling with air dehu- midification can be deactivated.
In the rear compartment, you can also switch
climate control for the rear seats to automatic mode using the 0058button. Activating/switching X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X Set the desired temperature.
X To activate: press the0058button.
The indicator lamp in the 0058button lights
up. Automatic air distribution and airflow
are activated.
X To switch to manual mode: press the
008F button.
or
X Press the 0095or0097 button.
The indicator lamp in the 0058button goes
out.
3-zone automatic climate control: when
automatic mode is activated, you can select a climate mode (Y page 147).146
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

MAX COOL is only operational when the
engine is running.
X To activate: press the00C9button.
The indicator lamp in the button lights up.
X To activate: press off-road button 00C9
again.
The indicator lamp goes out. The previously
selected settings are restored.
When you activate MAX COOL, climate con-
trol switches to the following functions:
R maximum cooling
R maximum airflow
R air-recirculation mode on Defrosting the windows
Windows fogged up on the inside X
Activate the 005A/0056cooling with air
dehumidification function.
X Activate automatic mode 0058.
X If the windows continue to fog up, activate
the "windshield defrosting" function
(Y page 149).
i You should only select this setting until
the windshield is clear again.
Windows fogged up on the outside X
Press the 008Fbutton repeatedly until the
009C or009B symbol appears in the dis-
play.
i You should only select this setting until
the windshield is clear again. Rear window defroster
General notes The rear window defroster has a high current
draw. You should therefore switch it off as
soon as the rear window is clear. Otherwise,
the rear window defroster switches off auto-
matically after several minutes.
If the battery voltage is too low, the rear win-
dow defroster may switch off.
Switching on/off X
Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X Press the 006Cbutton.
The indicator lamp in the 006Cbutton lights
up or goes out. 150
Operating the climate control systemsClimate control

Problems with the rear window defroster
Problem
Possible causes/consequences and
0050
0050Solutions The rear window
defroster has deactiva-
ted prematurely or can-
not be activated. The battery has not been sufficiently charged.
X Switch off any consumers that are not required, e.g. reading
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window
defroster can be activated again. Activating/deactivating air-recircula-
tion mode
General notes You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle
from outside. The air already inside the vehi-
cle will then be recirculated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in particu-
lar at low temperatures. Only use air-recircu-
lation mode briefly to prevent the windows
from fogging up.
Activating/deactivating The operation of air-recirculation mode is the
same for all control panels.
X Turn the SmartKey to position 2in the igni-
tion lock (Y page 157).
X To activate: press the0089button.
The indicator lamp in the 0089button lights
up.
i In the event of high pollution levels (3-
zone automatic climate control only) or at high outside temperatures, air-recircula-
tion mode is automatically activated. When
air-recirculation mode is activated auto-
matically, the indicator lamp in the 0089
button is not lit.
Outside air is added after about
30 minutes.
X To deactivate: press the0089button.
The indicator lamp in the 0089button goes
out.
i Air-recirculation mode deactivates auto-
matically:
R after approximately five minutes at out-
side temperatures below approximately
41 ‡ (5 †)
R after approximately five minutes if cool-
ing with air dehumidification is deactiva-
ted
R after approximately 30 minutes at out-
side temperatures above approximately
41 ‡ (5 †) if the "Cooling with air dehu-
midification" function is activated Activating/deactivating the residual
heat function
General notes The residual heat function is only available on
vehicles for Canada.
It is possible to make use of the residual heat
of the engine to continue heating the station- ary vehicle for up to 30 minutes after the
engine has been switched off. The heating
time depends on the set interior temperature. Operating the climate control systems
151Climate control

Setting the side air vents
0043
Side window defroster vent
0044 Side air vent
0087 Control for side air vent
X To open/close: turn thumbwheel 0087up or
down. Setting the glove box air vent
! Close the air vent when heating the vehi-
cle.
At high outside temperatures, open the air
vent and activate the "cooling with air dehu- midification" function. Otherwise, temper-
ature-sensitive items stored in the glove
box could be damaged. 0043
Air vent thumbwheel
0044 Air vent
When automatic climate control is activated,
the glove box can be ventilated, for instance
to cool its contents. The level of airflow
depends on the airflow and air distribution
settings. X
To open/close: turn thumbwheel 0043
clockwise or counter-clockwise. Setting the rear-compartment air
vents
Setting the center vents in the rear com-
partment Example: center vents with rear control panel
0043
Rear-compartment air vent thumbwheel
0044 Rear-compartment air vent, right
0087 Rear control panel
0085 Rear-compartment air vent, left
X To open/close: turn thumbwheel 0043up or
down.
Setting the B-pillar air vent 0043
B-pillar air vent
0044 Thumbwheel for B-pillar air vent
X To open/close: turn thumbwheel 0044to the
left or right. Setting the air vents
153Climate control Z

Display messages
Possible causes/consequences and
0050
0050Solutions 0049
Auto Auto
Lamp
LampFunction
Function
Inoperative
Inoperative The light sensor is defective.
X Visit a qualified specialist workshop. 0049
Switch Off Lights Switch Off Lights The lights are still switched on when you leave the vehicle. A
warning tone also sounds.
X Turn the light switch to 0058.Adaptive Highbeam Adaptive Highbeam
Assist Inoperative Assist Inoperative Adaptive Highbeam Assist is faulty.
X
Visit a qualified specialist workshop. Adaptive Highbeam Adaptive Highbeam
Assist Currently Assist Currently
Unavailable See Unavailable See
Operator's Manual Operator's Manual Adaptive Highbeam Assist is deactivated and temporarily inoper-
ative. Possible causes are:
R the windshield in the camera's field of vision is dirty.
R visibility is impaired due to heavy rain, snow or fog.
X Clean the windshield.
If the system detects that the camera is fully operational again, the
Adaptive Highbeam Assist Now Available
Adaptive Highbeam Assist Now Available message is dis-
played.
Adaptive Highbeam Assist is operational again. Engine
Display messages
Possible causes/consequences and
0050 0050Solutions 00BD
Check Coolant Check Coolant
Level See Opera‐ Level See Opera‐
tor's Manual tor's Manual The coolant level is too low.
! Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
X Add coolant, observing the warning notes before doing so
(Y page 369).
X If coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist work-
shop. 00AC The fan motor is faulty.
X At coolant temperatures below 248 ‡ (120 †), drive to the
nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in moun-
tainous terrain, and stop-and-go traffic. 300
Display
messagesOn-board computer and displays