Mercedes-Benz 2009 M-Class Operator's Manual page 198

Controls in detail
3-zone automatic climate control
Function
9 AC cooling on/off
d
9 Residual heat ventilation
Display
e
ß Decreasing air volume
f
: Air recirculation
g
7 Air distribution, driver's side (directs air through
h
center and side air vents)
8 Air distribution, driver's side (directs air through the
j
footwells and side air vents)
Interior temperature sensor
k
; Adopting driver's side settings for all zones
l
196
Recommendation/Notes
i Switches on the air conditioning. The indicator lamp
in button 9 comes on.
i With the engine turned off, it is possible to continue
to heat or ventilate the interior.
i Only use this function for a short time, e.g. in a tunnel.
Otherwise, the windows can fog up due to lack of fresh
air.
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