Mercedes-Benz M-Class 2006 Owners Manual - Manual (Page 213)

212
Controls in detail
Climate control
Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.
̈ Press button 2 again.
The indicator lamp on button 2
comes on.
The air conditioning uses the refrigerant
R134a. This refrigerant is free of CFCs
which are harmful to the ozone layer.
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.
Activating
̈ Turn the SmartKey in the starter switch
to position 0 or 1, or remove it from
the starter switch.
̈ Press button T ( ୴ page 204).
The indicator lamp on button T
comes on.
Deactivating
̈ Press button T ( ୴ page 204).
The indicator lamp on button T
goes out.
!
If the air conditioning cannot be turned
on again, this indicates that the air con-
ditioning is losing refrigerant. The com-
pressor has turned itself off.
Have the air conditioning checked at
the nearest authorized Mercedes-Benz
Light Truck Center.
i
How long the system will provide heat-
ing depends on the coolant tempera-
ture and the battery voltage.
Regardless of the temperature and air
volume set on the climate control panel
an interior temperature is aimed at by
72°F (22°C) and the blower runs for
the protection of the battery on low
stage.