Mercedes Benz 2009 M-Class User Manual

Page of 585
229
Controls in detail
3-zone automatic climate control*
Activating
Press button
: (
page 222).
The indicator lamp on the button 
comes on.
Deactivating
Press button
: (
page 222).
The indicator lamp on the button 
comes on.
At outside temperatures above 79°F 
(26°C) the system will not automatically 
switch back to outside air. A quantity of 
outside air is added after approximately 
30 minutes.
Air recirculation mode with conve-
nience closing and opening feature
i
The air recirculation mode is activated auto-
matically at high outside temperatures.
The indicator lamp on button
: is not lit when 
the air recirculation mode is automatically 
switched on.
A quantity of outside air is added after approxi-
mately 30 minutes.
If you have turned off the air conditioning 
(
page 230) or the outside temperature is 
below 41°F (5°C), the air recirculation mode will 
not switch on automatically.
i
To cool the interior as fast as possible, the 
automatic climate control automatically switch-
es to air recirculation. The indicator lamp on 
button
is not lit when the system switches 
to air recirculation automatically.
i
The air recirculation mode is deactivated 
automatically
after 5 minutes if the outside temperature is 
below approximately 41°F (5°C)
after 5 minutes if the air conditioning and 
air-drying is turned off
after 30 minutes if the outside temperature 
is above approximately 41°F (5°C)
Warning!
G
Never operate the side windows and 
tilt/sliding sunroof* if there is the possibility 
of anyone being harmed by the opening or 
closing procedure.
In case the procedure causes potential 
danger:
Vehicles with or without tilt/sliding sun-
roof*: The closing of the windows can be im-
mediately halted by pressing or pulling the 
respective window switch. The closing of the 
tilt/sliding sunroof* can be immediately 
halted by moving the switch for the tilt/slid-
ing sunroof* in any direction.
The closing of the side windows and the 
tilt/sliding sunroof* can be reversed by 
again pressing and holding the 
: button.