Mercedes-Benz 2008 M-Class Operator's Manual page 212

The climate control switches to the follow-
ing functions automatically:
most efficient blower speed and
heating power, depending on outside
temperature
air flows onto the windshield and the
front door windows (side air vents must
be open)
the air conditioning compressor
switches on at outside temperatures
above approximately 41°F (5°C) for
air-drying
Adjustments
You can adjust the air volume and the tem-
perature when the front defroster is
switched on. The air flow will remain on the
windshield and front door windows.
Press button ˜ to decrease or
button Q to increase air volume
( page 206) to the desired level.
The air volume decreases/increases to
the next lower/higher blower speed
and heating switches to the tempera-
ture that was set before the front de-
froster was switched on.
The indicator lamp on button |
goes out. The indicator lamp on
button 9 comes on.
or
Turn temperature control 1
and/or 7 ( page 206) slightly in any
direction.
Heating switches to the temperature
that was set before the front defroster
was switched on.
Controls in detail
Climate control
The indicator lamp on button |
goes out. The indicator lamp on
button 9 comes on.
i
The air conditioning compressor remains on
even if the indicator lamp in button | goes
out. This helps to prevent the windshield from
fogging.
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