Mersedes SUV Manuals

Operating the climate control system

Mercedes-Benz M-Class / Mercedes-Benz M-Class Owners Manual / Climate control / Operating the climate control system

Activating/deactivating climate control

Important information

When the climate control system is 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.

Switch on climate control primarily using
Switch on climate control primarily using the In the rear compartment, you can also switch button.


In the rear compartment, you can also switch climate control on and off using the and
and Activating/deactivating buttons.


Activating/deactivating

- Turn the SmartKey to position 2 in the ignition lock.

- To switch on: press the The indicator lamp in the  button button.


The indicator lamp in the lights button
lights up. Airflow and air distribution are set to automatic mode.

or
- Press the The indicator lamp in the  button button.


The indicator lamp in the goes button
goes out. The previously selected settings come into effect again.

- To switch off: press the button.
button.

The indicator lamp in the lights button
lights up.

Activating/deactivating the cooling with 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.

If you switch off the cooling function, the 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.

The cooling with air dehumidification
The cooling with air dehumidification function uses refrigerant R134a. This coolant does not contain chlorofluorocarbons, and therefore does not damage the ozone layer.

Activating/deactivating

- To activate: press the button.
button.

The indicator lamp in the button lights up.
button lights up.

- To deactivate: press the button.
button.

The indicator lamp in the button goes out. The cooling with air
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 indicator lamp in the button flashes three button, the
indicator lamp in the button flashes three times or remains off. You can no longer switch on the cooling with air dehumidification function.

- Consult a qualified specialist workshop.

Setting climate control to automatic

If you switch off the cooling function, the 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.

In the rear compartment, you can also switch climate control for the rear seats to automatic mode using the - Turn the SmartKey to position 2 in the button.


- Turn the SmartKey to position 2 in the ignition lock.

- Set the desired temperature.

- To activate: press the The indicator lamp in the  button button.


The indicator lamp in the lights button
lights up. Automatic air distribution and airflow are activated.

Automatic climate control: when
Automatic climate control: when automatic mode is activated, you can select a climate mode setting.

- To switch off: press the button.
button.

or - Press the button. or
The indicator lamp in the  button button.


The indicator lamp in the goes button
goes out.

Adjusting the climate mode settings (AIR FLOW)

This function is only available with automatic climate control.

The climate control settings are especially effective at high temperatures.

You can select the following climate control settings in automatic mode:

FOCUS high airflow that is set slightly cooler
MEDIUM medium airflow, standard setting DIFFUSE low airflow that is set slightly warmer and with a lower rate of airflow

- Turn the SmartKey to position 2 in the ignition lock.

- Press the - Press the  button repeatedly until button.


- Press the the button repeatedly until
the desired climate mode appears in the display.

Setting the temperature

Climate control

Different temperatures can be set for the driver's and front-passenger sides.

- Turn the SmartKey to position 2 in the ignition lock.

- To increase/reduce: turn controls 1 and 6 clockwise or counterclockwise.

Only change the temperature setting in small increments. Start at 72 F (22 C ).

3-zone automatic climate control

Automatic climate control zones
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.

- Turn the SmartKey to position 2 in the ignition lock.

- To increase/reduce the temperature in the front: turn controls 1 and 6 clockwise or counterclockwise.

Only change the temperature setting in small increments. Start at 72 F (22 C).

- To increase/reduce the temperature in the rear compartment using the front control panel: press the The indicator lamp in the  button button.


The indicator lamp in the goes button
goes out.

- Turn control 1 clockwise or counterclockwise.

Only change the temperature setting in small increments. Start at 72 F (22 C ).

The temperature setting for the driver's side is adopted for the rear compartment and the front-passenger side.

- To increase/decrease the rear compartment temperature using the rear control panel: turn control 17 on the rear control panel clockwise or counterclockwise.

Only change the temperature setting in small increments. Start at 72 F (22 C ).

Setting the air distribution

Front control unit:

vents. Directs air through the center
vents.

footwell air vents Directs the airflow through the
footwell air vents
center and footwell vents. Directs the airflow through the
center and footwell vents.

defroster vents Directs the airflow through the
defroster vents
defroster and center vents Directs the airflow through the
defroster and center vents footwell and defroster vents Directs the airflow through the
footwell and defroster vents defroster, center and footwell air vents Directs the airflow through the
defroster, center and footwell air vents

Rear control panel:

rear Directs the airflow through the
rear center and rear side air vents.

footwell air vents Directs the airflow through the
footwell air vents

Using the rear control panel, you can also
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.

Regardless of the air distribution setting,
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.

- Turn the SmartKey to position 2 in the ignition lock.

- Front control panel: press the button repeatedly until the desired symbol
button repeatedly until the desired symbol appears in the display.

- Rear control panel: press the and/or  button.
and/or Setting the airflow button.


Setting the airflow

- Turn the SmartKey to position 2 in the ignition lock.

- To increase: press the - To reduce: press the  button. button.


- To reduce: press the button.


You can use automatic climate control to
You can use automatic climate control to set the airflow in the rear compartment separately.

Switching the ZONE function on/off

- To switch on: press the button.
button.

The indicator lamp in the lights button
lights up.

Dual-zone automatic climate control: the temperature setting for the driver's side is not adopted for the front-passenger side.

The temperature of the front-passenger side is adopted for the rear compartment.

Automatic climate control: the temperature setting for the driver's side is not adopted for the front-passenger side and the rear compartment.

When the buttons or controls for temperature, airflow or air distribution are activated, the temperature setting for the driver's side is not adopted for the other climate control zones.

- To switch off: press the button.
button.

The indicator lamp in the goes button
goes out.

The temperature setting for the driver's side is adopted for the front-passenger side and the rear compartment.

Defrosting the windshield

You can use this function to defrost the windshield or to defrost the inside of the windshield and the side windows.

You should only select the defrosting
You should only select the defrosting function until the windshield is clear again.

- Turn the SmartKey to position 2 in the ignition lock.

- To activate: press the The indicator lamp in the  button button.


The indicator lamp in the lights button
lights up.

The climate control system switches to the following functions:
    - cooling with air dehumidification on     - high airflow     - high temperature     - air distribution to the windshield and front side windows     - air-recirculation mode off

- To switch off: press the button.
button.

The indicator lamp in the goes button
goes out. The previously selected settings come into effect again. The cooling with air dehumidification function remains on. Airrecirculation mode remains deactivated.

or
- Press the The indicator lamp in the  button button.


The indicator lamp in the goes button
goes out. Airflow and air distribution are set to automatic mode.

or
- Turn controls 1 or 6 clockwise or counter-clockwise.

or
- Press the button. or
Switching maximum cooling MAX button.


Switching maximum cooling MAX COOL on/off

The MAX COOL function is only available in vehicles for the USA.

MAX COOL is only operational when the engine is running.

When you activate MAX COOL, climate control switches to the following functions: - maximum cooling
- maximum airflow
- air-recirculation mode on

- To activate: press the button.
button.

The indicator lamp in the button lights up.

- To deactivate: press the again. button
again.

The indicator lamp goes out. The previously selected settings come into effect again.

Defrosting the windows

Windows fogged up on the inside

- Activate the dehumidification function. cooling with air
dehumidification function.

- Activate automatic mode - If the windows continue to fog up, activate.


- If the windows continue to fog up, activate the defrosting function.

You should only select this setting until
You should only select this setting until the windshield is clear again.

Windows fogged up on the outside

- Activate the windshield wipers.

- Press the until the button repeatedly
until the symbol appears in the or
display. symbol appears in the
display.

You should only select this setting until
You should only select this setting until the windshield is clear again.

Rear window defroster

Activating/deactivating

Any accumulation of snow and ice should be WARNING
Any accumulation of snow and ice should be removed from the rear window before driving.

Visibility could otherwise be impaired, endangering you and others.

The rear window defroster has a high current draw. You should therefore switch it off as soon as the window is clear as it only switches off automatically after several minutes.

If the battery voltage is too low, the rear window defroster may switch off.

- Turn the SmartKey to position 2 in the ignition lock.

- Press the The indicator lamp in the  button button.


The indicator lamp in the lights button
lights up or goes out.

Problems with the rear window defroster

The rear window defroster has deactivated itself prematurely or cannot be activated.

- Switch off any consumers that are not required, e.g. reading lamps or interior lighting.

When the battery is sufficiently charged, the rear window defroster is activated again automatically.

Activating/deactivating airrecirculation mode

You can deactivate the flow of fresh air if unpleasant odors are entering the vehicle from outside. The air already inside the vehicle will then be recirculated.

The operation of air-recirculation mode is the same for all control panels.

Fogged windows impair visibility, WARNING
Fogged windows impair visibility, endangering you and others. If the windows begin to fog on the inside, switching off the air recirculation mode immediately should clear interior window fogging. If interior window fogging persists, make sure the air conditioning is activated, or press the

button.
button.

- Turn the SmartKey to position 2 in the ignition lock.

- To activate: press the The indicator lamp in the  button button.


The indicator lamp in the lights button
lights up.

In the event of high pollution levels or at
In the event of high pollution levels or at high outside temperatures, airrecirculation mode is automatically activated. When air-recirculation mode is activated automatically, the indicator lamp in the Outside air is added after about 30 button is not lit.


Outside air is added after about 30 minutes.

- To switch off: press the button.
button.

The indicator lamp in the goes button
goes out.

Air-recirculation mode deactivates
Air-recirculation mode deactivates automatically:

Rafter approximately five minutes if outside temperatures are less than about 41 F (5 C) Rafter approximately five minutes if cooling with air dehumidification is deactivated Rafter approximately 30 minutes if outside temperatures are over about 41 F (5 C) Rif you press the switch on cooling with air button and
switch on cooling with air dehumidification

Activating/deactivating the residual heat function

The residual heat function is only available in Canada It is possible to make use of the residual heat of the engine to continue heating the stationary vehicle for up to 30 minutes after the engine has been switched off. The heating time depends on the temperature that has been set.

The blower will run at a low speed
The blower will run at a low speed regardless of the airflow setting.

If you activate the residual heat function
If you activate the residual heat function at high temperatures, only the ventilation will be activated. The blower runs at medium speed.

- Turn the SmartKey to position 0 in the ignition lock or remove it.

- To activate: press the The indicator lamp in the button.


The indicator lamp in the button lights up.
button lights up.

- To deactivate: press the button.
button.

The indicator lamp in the button goes out.
button goes out.

Residual heat is deactivated
Residual heat is deactivated automatically:
- after about 30 minutes - when the ignition is switched on - if the battery voltage drops - if the coolant temperature is too low

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