Air Conditioning; Residual Heat And Ventilation - Mercedes-Benz 2008 R 320 CDI 4MATIC Operator's Manual

Air conditioning

The air conditioning is operational while
the engine is running and cools the interior
air to the temperature set by the operator.
In addition, the air conditioning dehumidi-
fies the interior air at outside temperatures
above 41°F (5° C) and helps prevent
window fogging.
i
Condensation may drip out from underneath
the vehicle. This is normal and not an indication
of a malfunction.
Warning!
If you turn off the cooling function, the inte-
rior air is not dried. The windows can fog up
more quickly. Window fogging may impair
visibility and endanger you and others.
Deactivating
It is possible to deactivate the air condi-
tioning (cooling) function of the climate
control system. The air in the vehicle will
then no longer be cooled or dehumidified.
Press button 9 ( page 210).
The indicator lamp on the button goes
out.
Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.
Press button 9 ( page 210) again.
The indicator lamp on the button
comes on.
The air conditioning uses the refrigerant
G
R134a. This refrigerant is free of CFCs
which are harmful to the ozone layer.
!
If the air conditioning cannot be turned on
again, this indicates that the air conditioning is
losing refrigerant. The compressor has turned
off.
Have the air conditioning checked at the nearest
authorized Mercedes-Benz Light Truck Center.
Controls in detail
Climate control

Residual heat and ventilation

With the engine switched off, it is possible
to continue to heat or ventilate the interior
for up to 30 minutes. This feature makes
use of the residual heat produced by the
engine.
i
How long the system will provide heating
depends on
the coolant temperature
the battery voltage
Regardless of the temperature and air volume
set on the climate control panel, an interior tem-
perature is aimed at by 72°F (22°C) and the
blower runs on low speed to protect the vehicle
battery.
Activating
Switch off the ignition ( page 39).
Press button 9 ( page 210).
The indicator lamp on the button
comes on.
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