Mercedes-Benz 2009 M-Class Operator's Manual page 204

Controls in detail
3-zone automatic climate control
Adjusting air volume
USA only
X
Decrease/increase: Press button
Q.
The automatic mode is switched off. The
selected blower speed is shown in air
volume display ( Y page 191).
b
Canada only
X
Decrease/increase: Press button
Q.
The automatic mode is switched off. The
selected blower speed appears in display
( Y page 194).
e
Front defroster
You can use this setting to defrost the
windshield, for example if it is iced up.
You can also defog the windshield and the
side windows.
i
Keep this setting selected only until the
windshield or the side windows are clear
again.
202
Activating
X
Press button |.
The indicator lamp in the button comes on.
or
·
The climate control switches to the
following functions automatically:
most efficient blower speed and heating
R
power, depending on outside
temperature
air flows onto the windshield and the
R
or
front door windows (side air vents must
·
be open)
the air conditioning compressor
R
switches on at outside temperatures
above approximately 41‡ (5†) for air-
drying
Adjustments
You can adjust the air volume and the
temperature when the front defroster is
switched on. The air flow will remain on the
windshield and front door windows.
X
Press button
Ï
to increase air volume to the desired
Q
level.
The air volume decreases/increases to the
next lower/higher blower speed and
heating switches to the temperature that
was set before the front defroster was
switched on.
The indicator lamp in button
The indicator lamp in button
on.
or
X
Turn temperature control
(USA only) (
(Canada only) (
direction.
Heating switches to the temperature that
was set before the front defroster was
switched on.
The indicator lamp in button
The indicator lamp in button
on.
i
on even if the indicator lamp in button
|
windshield from fogging.
to decrease or button
Deactivating
X
Press button
The indicator lamp in the button goes out.
Defrosting is turned off.
|
9
and/or
1
Y page 191) or and/or
1
Y page 194) slightly in any
|
9
The air conditioning compressor remains
goes out. This helps to prevent the
once more.
|
goes out.
comes
7
9
goes out.
comes