2025-2026 Mercedes G Class SUV Climate control User Manual
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Climate control for Your Mercedes G Class SUV Fifth Generation (2025-2026)

Climate control
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Overview of climate control systems
247
Operating the climate control system 248
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Climate control
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247
Overview of climate control systems
Notes on climate control
An interior filter in combination with the prefilter in the engine compartment
must always be used so that the air conditioning system, pollution level
monitoring and the air filtration work correctly. Use filters recommended and
approved by Mercedes-Benz. Always have maintenance work carried out at a
qualified specialist workshop.
Overview of the air conditioning control panel
The indicator lamps on the buttons indicate that the corresponding function is
activated.
1 q Sets the temperature on the driver's side, left
2 A Calls up the air conditioning menu, left (/page248)
3 H Sets the airflow or switches off climate control
4 Ã Sets climate control to automatic mode (/page249)
5 ¬ Defrosts the windscreen
6 ¤ Switches the rear window heater on/off
7 g Switches air-recirculation mode on/off (/page250)
8 ¿ Switches the A/C function on/off (/page248)
9 & Switches pre-entry climate control on/off
A q Sets the temperature on the front passenger side
REAR OPERATING UNIT
1 Sets the temperature in the rear passenger compartment
2 Display
3 Sets the airflow in the rear passenger compartment
%
After four hours of non-operational time (ignition switched off),
the specified climate values for temperature setting and manual
blower in the rear passenger compartment will be synchronised
with the driver's climate zone.
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Climate control Overview of climate control systems
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Operating the climate control system
Switching climate control on/off
#
To switch on: set the airflow to level 1 or higher using theH button.
#
To switch off: set the airflow to level 0 using theH button.
If climate control is switched off, the windows may mist up more quickly.
Switch climate control off only briefly.
Rear climate control cannot be switched off separately.
Switching the A/C function on/off via the
operating unit
The A/C function heats, cools and dehumidifies the vehicle's interior air.
#
Press the button¿.
Switch off the A/C function only briefly. Otherwise, the windows could mist up
more quickly.
Condensation may drip from the underside of the vehicle when cooling mode
is active. This is not indicative of a fault.
THE A/C FUNCTION WILL BE DEACTIVATED IN THE FOLLOWING CASES:
R
When you are driving on an uphill or downhill gradient of more than 35%
R
When you are driving at an angle across an incline of more than 15°
Calling up the air conditioning menu via mul‐
timedia system or the air conditioning control
panel
The air conditioning menu can be called up via the temperature display or via
the air conditioning control panel. The temperature display is always shown on
the lower edge of the media display.
#
Press on the temperature display on the lower edge of the media dis‐
play.
or
#
Press the A button in the air conditioning control panel.
Activating/deactivating the A/C function via
the air conditioning menu
Multimedia system:
4
Climate menu
5
First row of seats
Depending on the external conditions, support for improved cooling and dehu‐
midification of the interior air will be provided when the A/C function is activa‐
ted. If it is not possible to operate the A/C function on the climate bar on the
central display, switch the function on or off on the air conditioning control
panel.
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Climate control Operating the climate control system
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249
#
Select A/C (A/C).
THE A/C FUNCTION WILL BE DEACTIVATED IN THE FOLLOWING CASES:
R
When you are driving on an uphill or downhill gradient of more than 35%
R
When you are driving at an angle across an incline of more than 15°
Switch off the A/C function only briefly; otherwise the windows may mist up
more quickly.
Condensation may drip from the underside of the vehicle when cooling mode
is active. This is not indicative of a fault.
Setting climate control to automatic mode
In automatic mode, the set temperature is controlled and maintained at a
constant level by the air supply.
#
Press theÃ button.
#
To switch to manual mode: press the à button again.
Overview of the air distribution settings
THE SYMBOLS ON THE DISPLAY INDICATE WHICH VENTS THE AIRFLOW
IS BEING DIRECTED THROUGH:
¯
Demister vents
P
Centre and side air vents
O
Footwell vents
Setting air distribution using the air condi‐
tioning menu
Multimedia system:
4
Climate menu
#
Select First row of seats.
#
To set air distribution: select ¯, P or O.
#
Set the airflow.
%
When the air conditioning system is switched on, at least one
zone is always active. However, several air distribution options
can be selected at the same time, for example to set the climate
control for the vehicle interior and the footwells simultaneously.
In doing so, the ¯ climate control for the windscreen can
only be selected for the first seat row. When automatic mode
is active, the buttons for setting the air distribution are automati‐
cally deactivated. When the air conditioning system is switched
off, the buttons remain operable and the last setting is saved.
Setting rear climate control using the air con‐
ditioning menu
Multimedia system:
4
Climate menu
SETTING THE TEMPERATURE
#
Select Second row of seats.
#
Set the temperature with s or r.
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SETTING THE AIRFLOW
#
Select Second row of seats.
#
Set the air flow with t or u.
CONTROLLING THE REAR CLIMATE CONTROL AUTOMATICALLY
#
Select AUTO.
%
When the defrost function is activated, some functions (e.g. the
temperature setting) will automatically be deactivated. To deacti‐
vate the defrost function, press either¬,Ã orj set the
air flow to level 0 (/page250).
Switching the synchronisation function on/off
via the air conditioning menu
Multimedia system:
4
Climate menu
5
First row of seats
The synchronisation function controls the climate control centrally. The driv‐
er's settings for temperature, airflow and air distribution are automatically
adopted for each climate zone.
#
Select SYNC (SYNC).
Demisting/defrosting the windows
FROZEN OR MISTED WINDSCREEN
#
Press the¬ button on the air-conditioning control panel
(/page247).
The windscreen is heated by warm air from the air-conditioning system
and by the electric windscreen heater.
WINDOWS MISTED UP ON THE INSIDE
#
Press theÃ button on the air-conditioning control panel.
#
If the windows remain misted up: press the¬ button.
The windscreen is heated by warm air from the air-conditioning system
and by the electric windscreen heater.
%
The windscreen heater can also be switched on and off sepa‐
rately on the
Climate menu via è.
WINDOWS MISTED UP ON THE OUTSIDE
#
Switch on the windscreen wipers.
#
Press theÃ button.
Switching air-recirculation mode on/off
#
Press the buttong.
The interior air is recirculated.
Air-recirculation mode will automatically switch to fresh air mode after a while.
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%
The windows may mist up more quickly with air-recirculation
mode switched on. Do not have air-recirculation mode switched
on for long periods.
Activating/deactivating ionisation
Multimedia system:
4
Climate menu
5
Air quality
When ionisation is activated, the air in the vehicle interior is enriched with
negatively charged oxygen ions. These can promote the well-being of the
vehicle occupants.
#
Select Ionisation.
%
The function can only be performed if the AUTO mode is activa‐
ted or the air distribution is set to the side air vent. The function
is restricted if the side air vents on the driver's side are closed.
Information on the windscreen heater
&
WARNING
Risk of burns from touching the windscreen when the windscreen
heater is switched on
The windscreen can become very hot when the windscreen heater is
switched on.
The health of persons with limited temperature sensitivity or a limited
ability to react to high temperatures may be affected or they may even
suffer burn-like injuries.
#
Do not touch the windscreen while the windscreen heater is
switched on.
#
Allow the windscreen to cool down before touching it.
REQUIREMENTS:
R
The vehicle is ready to drive (õ or drive range h or k is shown on
the driver display).
R
The relevant environmental conditions are prevailing, e.g. an outside
temperature of less than 5°C.
When ¬ is switched on, the windscreen heater will be switched on auto‐
matically as needed.
The windscreen heater can also be switched on and off separately on the
Climate menu via è.
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%
If the on-board electrical system voltage is low, the function of
the windscreen heater may be impaired.
Pre-entry climate control using the key
FUNCTION OF PRE-ENTRY CLIMATE CONTROL VIA THE KEY
Before you get into the vehicle, the driver's side or the whole vehicle interior
can be briefly pre-warmed or pre-cooled.
DURING PRE-COOLING, THE FOLLOWING FUNCTIONS WILL BE ACTIVA‐
TED AS NEEDED:
R
Automatic climate control
R
Blower
R
Seat ventilation
DURING PRE-HEATING, THE FOLLOWING FUNCTIONS WILL BE ACTIVA‐
TED AS NEEDED:
R
Automatic climate control
R
Blower
R
Seat heating
R
Steering wheel heater
R
Panel heating
R
Ionisation
You can watch an animation on this topic via the following link:
SETTING PRE-ENTRY CLIMATE CONTROL (VIA KEY) IN THE MULTIMEDIA
SYSTEM
Multimedia system:
4
Climate menu
5
Pre-entry climate ctrl
#
Select Z.
#
Select Pre-entry climate control upon unlocking.
#
Activate or deactivate the function.
SELECTING SEATS
#
Select Z.
#
Select Driver's seat only.
The seat-specific functions of pre-entry climate control (e.g. seat heat‐
ing) are performed for the selected seats.
When pre-entry climate control is enabled, an LED on the climate bar of the
media display will light up blue for a cooled vehicle and red for a heated
vehicle.
SWITCHING PRE-ENTRY CLIMATE CONTROL (VIA KEY) ON/OFF
Requirements:
R
The high-voltage battery is sufficiently charged.
R
The function has been activated via the multimedia system or the
Mercedes-Benz app.
#
To switch on: unlock the vehicle.
The climate control functions are activated for up to two minutes for
preheating and precooling.
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Climate control Operating the climate control system
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Pre-entry climate control (via key) cannot be activated more than three times
when the vehicle is switched off.
#
To switch off: push the button& up or down.
THE FOLLOWING FUNCTIONS WILL REMAIN ACTIVE ONCE THE VEHICLE
HAS BEEN STARTED:
R
Seat heating
R
Seat ventilation
R
Panel heating
R
Ionisation
Pre-entry climate control for departure time
PRE-ENTRY CLIMATE CONTROL FOR DEPARTURE TIME FUNCTION
&
WARNING
Risk of fatal injury due to exposure to extreme heat or cold in the
vehicle
If persons, particularly children, are subjected to prolonged exposure to
intense heat or cold, there is a risk of severe injury or even death.
#
Never leave persons, particularly children, unattended in the
vehicle.
&
WARNING
Risk of burns due to repeatedly switching on the seat heating
Repeatedly switching on the seat heating can cause the seat cushion
and seat backrest padding to become very hot.
In particular, the health of persons with limited temperature sensitivity
or a limited ability to react to high temperatures may be affected or
they may even suffer burn-like injuries.
#
Do not repeatedly switch on the seat heating.
To protect against overheating, the seat heating may be temporarily deactiva‐
ted after it has been switched on repeatedly.
The vehicle interior can be air-conditioned when the vehicle is parked.
When the vehicle is connected to power supply equipment, priority will be
given to charging the high-voltage battery to a specified minimum state of
charge.
THE RUNNING TIME OF PRE-ENTRY CLIMATE CONTROL MAY BE REDUCED
IN THE FOLLOWING CIRCUMSTANCES:
R
The vehicle is not connected to power supply equipment.
R
The high-voltage battery is not charged sufficiently.
With active pre-entry climate control, the state of charge of the high-voltage
battery may be reduced, even if the charging cable connector is connected.
DURING COOLING, THE FOLLOWING FUNCTIONS WILL BE ACTIVATED AS
NEEDED:
R
Automatic climate control
R
Blower
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R
Seat ventilation
DURING HEATING, THE FOLLOWING FUNCTIONS WILL BE ACTIVATED AS
NEEDED:
R
Automatic climate control
R
Blower
R
Seat heating
R
Steering wheel heater
R
Panel heating
R
Ionisation
SETTING PRE-ENTRY CLIMATE CONTROL FOR DEPARTURE TIME
Multimedia system:
4
Climate menu
5
Pre-entry climate ctrl
SETTING A SINGLE DEPARTURE TIME
#
Select ONCE.
#
Set a departure time.
CHANGING THE ACTIVE DEPARTURE TIME
#
Select ´ next to the displayed departure time.
#
Set a departure time.
SETTING THE WEEK PROFILE
#
Select WEEK PROFILE.
#
Set the desired departure times, e.g. every day at 08:00.
SELECTING THE ZONE
#
Select Z.
#
Select Driver's seat only.
If the Driver's seat only setting is deactivated, pre-entry climate control
will be carried out for the entire vehicle.
ACTIVATING/DEACTIVATING PRE-ENTRY CLIMATE CONTROL FOR DEPAR‐
TURE TIME
&
WARNING
Risk of fatal injury due to exposure to extreme heat or cold in the
vehicle
If persons, particularly children, are subjected to prolonged exposure to
intense heat or cold, there is a risk of severe injury or even death.
#
Never leave persons, particularly children, unattended in the
vehicle.
Requirements:
R
The high-voltage battery is charged sufficiently.
R
The function has been activated via the multimedia system.
#
To activate: set the departure time (/page254).
Pre-entry climate control for departure time will switch on a maximum of
55minutes before the selected departure time. It will remain active for
another five minutes if departure is delayed.
#
To deactivate: press the & button up or down.
THE FOLLOWING FUNCTIONS WILL REMAIN ACTIVE ONCE THE VEHICLE
HAS BEEN STARTED:
R
Seat heating
R
Seat ventilation
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R
Panel heating
R
Ionisation
Activating/deactivating immediate pre-entry
climate control
&
WARNING
Risk of fatal injury due to exposure to extreme heat or cold in the
vehicle
If persons, particularly children, are subjected to prolonged exposure to
intense heat or cold, there is a risk of severe injury or even death.
#
Never leave persons, particularly children, unattended in the
vehicle.
&
WARNING
Risk of burns due to repeatedly switching on the seat heating
Repeatedly switching on the seat heating can cause the seat cushion
and seat backrest padding to become very hot.
In particular, the health of persons with limited temperature sensitivity
or a limited ability to react to high temperatures may be affected or
they may even suffer burn-like injuries.
#
Do not repeatedly switch on the seat heating.
To protect against overheating, the seat heating may be temporarily deactiva‐
ted after it has been switched on repeatedly.
Air-conditioning of the vehicle interior can continue for up to 50minutes, e.g.
if the journey is interrupted.
#
Set the desired temperature using thew button.
#
Press button1.
The red or blue indicator lamp on button1 will light up or go out.
THE COLOURS OF THE INDICATOR LAMP HAVE THE FOLLOWING MEAN‐
INGS:
R
Blue: cooling is activated.
R
Red: heating is activated.
R
Yellow: the departure time has been preselected.
ACTIVATING IMMEDIATE PRE-ENTRY CLIMATE CONTROL VIA THE AIR-
CONDITIONING MENU
#
Press the& button on the Climate menu on the central display.
#
Set the desired temperature using thes or r arrow.
An LED will indicate when pre-entry climate control is activated. It will light up
blue when the vehicle is being cooled and red when it is being heated.
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Air vents
ADJUSTING THE FRONT AIR VENTS
&
WARNING
Risk of burns or frostbite due to being too close to the air vents
Very hot or very cold air can flow from the air vents.
#
Make sure that all vehicle occupants always maintain a suffi‐
cient distance from the air vents.
#
If necessary, direct the airflow to another area of the vehicle
interior.
TO GUARANTEE THE FLOW OF FRESH AIR THROUGH THE AIR VENTS INTO
THE VEHICLE INTERIOR, NOTE THE FOLLOWING:
R
Always keep the vents and ventilation grilles in the vehicle interior clear.
R
Keep the air inlet free of residue build-up (/page578).
#
To open or close: hold the centre of air vent1 and turn it to the left or
right as far as it will go.
#
To set the airflow direction: hold the centre of air vent1 and move it
up or down or to the left or right.
ADJUSTING THE REAR AIR VENTS
&
WARNING
Risk of burns or frostbite due to being too close to the air vents
Very hot or very cold air can flow from the air vents.
#
Make sure that all vehicle occupants always maintain a suffi‐
cient distance from the air vents.
#
If necessary, direct the airflow to another area of the vehicle
interior.
#
To open or close: hold the centre of air vent1 and turn it to the left or
right as far as it will go.
#
To set the airflow direction: hold the centre of air vent1 and move it
up or down or to the left or right.
%
Only cold air will flow from the rear air vents on the centre
console.
G-Class - Owner's Manual
Climate control Operating the climate control system
F465 0034 02

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