Operating The Climate Control System - Mercedes-Benz M-Class Owner's Manual

more quickly. This may prevent you from
observing the traffic conditions, thereby caus-
ing an accident.
Condensation may drip from the underside of
the vehicle when cooling mode is active. This
is normal and not a sign that there is a mal-
function.
i
The cooling with air dehumidification
function uses refrigerant R134a. This cool-
ant does not contain chlorofluorocarbons,
and therefore does not damage the ozone
layer.
Switching on/off
To activate: press the ¿/Á button.
X
The indicator lamp in the ¿/Á but-
ton lights up.
To deactivate: press the ¿/Á but-
X
ton.
The indicator lamp in the ¿/Á but-
ton goes out. The cooling with air dehumid-
ification 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 func-
tion.
Consult a qualified specialist workshop.
X
Setting climate control to automatic
mode
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

Operating the climate control system

activated. If desired, 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 à button.
Turn the key to position 2 in the ignition
X
lock.
Set the desired temperature.
X
To activate: press the à button.
X
The indicator lamp in the à button lights
up. Automatic air distribution and airflow
are activated.
i
THERMOTRONIC automatic climate con-
trol: when automatic mode is activated, you
can select a climate mode setting
( page 125).
Y
To switch off: press the _ button.
X
or
Press the I or K button.
X
The indicator lamp in the à button goes
out.
Setting the climate mode
This function is only available with the
THERMOTRONIC 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 key to position 2 in the ignition
X
lock.
Press the à button.
X
Press the ñ button repeatedly until the
X
desired climate mode appears in the dis-
play.
125
Z