2006 MERCEDES-BENZ ML500 Owner's Manual

208 Controls in detailClimate controlAdjusting automatically
Press buttonU (
page 204).
The indicator lamp on buttonU
comes on. The air distribution is
adjusted automatically.
Windshield fogged on the outside

Switch the windshield wipers on
(page 55).

Press the buttonU.
The indicator lamp on buttonU
comes on.
Adjusting air volume
Adjusting manually
Five blower speeds are available.
Press
to decrease orQ to in-
crease air volume to the desired level.
The indicator lamp on buttonU
goes out. The selected blower speed is
shown by the indicator lamps for air
volume settings (
page 204).
Adjusting automatically

Press buttonU.
The indicator lamp on buttonU
comes on. The air volume is adjusted
automatically.
Defrosting
If the air volume is switched off or the air
recirculation mode is switched on, the
interior is no longer ventilated and the
windows can get fogged on the inside.
Activating
Press button0(
page 204).
The yellow indicator lamp on the button
comes on.
The air conditioning switches automat-
ically to the following functions:


maximum blower and heating pow-
er


air flows onto the windshield and
the front side windows (side air
vents must be open)
iThese settings should only be selected
for a short time.

209 Controls in detail
Climate control


The climatic compressor is
switched on at outside tempera-
tures above approximately 41°F
(5°C) for air-drying
Deactivating

Press button0.
The yellow indicator lamp on the button
goes out. Defrosting is turned off.
Air recirculation mode
Switch to air recirculation mode to prevent
unpleasant odors from entering the vehicle
from the outside (e.g. before a tunnel trav-
el). This setting cuts off the intake of out-
side air and recirculates the air in the
passenger compartment.Activating

Press button:.
The indicator lamp on the button
comes on.
iTo switch off, you can press also
button´ orU.
Warning!
G
Fogged windows impair visibility,
endangering you and others. If the windows
begin to fog on the inside, switching off the
air recirculation mode immediately should
clear interior window fogging. If interior win-
dow fogging persists, make sure the air
conditioning (
page 204) is activated, or
press button0.
iPress and hold button: for approx.
two seconds. The side windows and
tilt/sliding sunroof* will close. You can
release button: once the closing
procedure has begun. The windows
and tilt/sliding sunroof* continue clos-
ing until they are fully closed.

210 Controls in detailClimate control
Deactivating
Press button:.
The indicator lamp on the button goes
out.
Warning!
G
Never operate the windows and tilt/sliding
sunroof* if there is the possibility of anyone
being harmed by the opening or closing pro-
cedure.
In the event that the closing procedure
causes potential danger, the closing of the
side windows can be immediately halted by
pressing or pulling the respective window
switch. The procedure for the tilt/sliding
sunroof can be immediately halted by mov-
ing the switch for the tilt/sliding 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.
iThe air recirculation mode is activated
automatically at high outside tempera-
tures.
After 30 minutes at the latest, outside
air is added.
If you have turned off the air condition-
ing (
page 211) or the outside
temperature is below 41°F (5°C), the
air recirculation mode will not switch
on automatically.
iTo achieve the fastest possible cooling
of the interior, the climate control auto-
matically switches to air recirculation.
The indicator lamp in the button:
is not illuminated when the system au-
tomatically switches to air recircula-
tion.
iPress and hold button: for approx.
two seconds. You can release
button: once the opening proce-
dure has begun. The windows and
tilt/sliding sunroof* continue opening
until they have reached their previous
position.
A window or tilt/sliding sunroof* will
only return to its previous position if it
has not been moved to another posi-
tion using the respective window
switch or tilt/sliding sunroof* switch
after it was closed with button:.
A window or tilt/sliding sunroof* that
was moved will remain in its current po-
sition if button: i s u s e d t o r e - o p e n
the remaining windows or tilt/sliding
sunroof*.

211 Controls in detail
Climate control
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 conditioning
The air conditioning is operational while
the engine is running and cools the interior
air to the temperature set by the operator.
In addition, the air conditioning dehumidi-
fies the interior air at outside temperatures
above 41°F (5° C) and helps prevent
window fogging.Deactivating
It is possible to deactivate the air condi-
tioning (cooling) function of the climate
control system. The air in the vehicle will
then no longer be cooled or dehumidified.

Press button2 (
page 204).
The indicator lamp on the button2
goes out.
iThe air recirculation mode is
deactivated automatically

after five minutes if the outside
temperature is below
approximately 41°F (5°C)


after five minutes if the air condi-
tioning and air-drying is turned off


after 30 minutes if the outside
temperature is above
approximately 41°F (5°C)
iCondensation may drip out from under-
neath the vehicle. This is normal and
not an indication of a malfunction.Warning!
G
If you turn off the cooling function, the
interior air is not dried. The windows can fog
up more quickly. Window fogging may im-
pair visibility and endanger you and others.

212 Controls in detailClimate controlActivating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.
Press button2 again.
The indicator lamp on button2
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 position0or1, or remove it from
the starter switch.

Press buttonT (
page 204).
The indicator lamp on buttonT
comes on.
Deactivating

Press buttonT (
page 204).
The indicator lamp on buttonT
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.
iHow 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.

213 Controls in detail
Climate control
Rear air conditioningRear climate control panel
1Left rear center air vent, adjustable
2Right rear center air vent, adjustable
3Air distribution and air volume
(automatic, manual)
4Directs air through the center air vents
5Directs air through the footwells and
both center air vents
6Rear air conditioning on/off
Activating rear air conditioning
Press buttonU.
The indicator lamp on buttonU
comes on. The temperature, air volume
and air distribution are adjusted
automatically.
iThe residual heat is automatically
turned off:

when the ignition is switched on


after about 30 minutes


if the coolant temperature is too
low


if the battery voltage drops

214 Controls in detailClimate controlDeactivating rear air conditioning
For an improved cooling or heating output
in the front passenger compartment, you
can switch off the rear passenger compart-
ment ventilation.
Press button´.
The indicator lamp on button´
goes out.
The cooling function switches off after
a short delay.Adjusting air distribution
Use the air distribution controls4 or5
to adjust the air distribution for the rear
passenger compartment.
The following symbols are found on the
controls:Adjusting manually

Press the desired air distribution con-
trol.
The indicator lamp in the Ubutton
goes out.
Adjusting automatically

Press buttonU (
page 213).
The indicator lamp in the Ubutton
illuminates. The air distribution is ad-
justed automatically.
Symbol
Function
Z
Directs air to the center air
vents
Y
Directs air to the footwells and
the side air vents

215 Controls in detail
Climate control
Adjusting air volume
The air volume for the rear zone corre-
sponds to the air volume settings for front
zone. You can switch off the air supply for
the rear zone.
You can switch off the supplied amount of
air volume.
Press button´ (
page 213).