Mercedes-Benz M-Class 2012 Owners Manual - Manual (Page 131)

normal and not a sign that there is a
malfunction.
i 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
X To activate: press the ¿/Á button.
The indicator lamp in the ¿/Á
button lights up.
X To deactivate: press the ¿/Á
button.
The indicator lamp in the ¿/Á
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 ¿/Á 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.
X
Consult a qualified specialist workshop.
Setting climate control to automatic
G 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 à button.
X Turn the SmartKey to position 2 in the
ignition lock.
X Set the desired temperature.
X To activate: press the à button.
The indicator lamp in the à button lights
up. Automatic air distribution and airflow
are activated.
i Automatic climate control: when
automatic mode is activated, you can
select a climate mode setting
(
Y
page 129).
X
To switch off: press the _ button.
or
X Press the I or K button.
The indicator lamp in the à 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
Operating the climate control system
129
Climate
control
Z