2006 MERCEDES-BENZ R350 climate control

227 Controls in detail
Climate control
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 button9 (
page 218).
The indicator lamp on the button goes
out.Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.

Press button9 (
page 218) again.
The indicator lamp on the button
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.
!If the air conditioning cannot be turned
on again, this indicates that the air con-
ditioning is losing refrigerant. The com-
pressor has turned 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 temperature


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
on low speed to protect the vehicle bat-
tery.

228 Controls in detailClimate controlActivating
Switch off the ignition (
page 38).

Press button9 (
page 218).
The indicator lamp on button comes
on.
Deactivating

Press button9 (
page 218) again.
The indicator lamp on the button goes
out.
Rear climate controlRear climate control panel
Activating rear climate control
Press buttonU.
The indicator lamp on the button
comes on. The air volume and air distri-
bution 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
1
Rear climate control on
(automatic mode)
2
Air distribution (directs air through
the center air vents)
3
Rear air conditioning off
4
Air distribution (directs air through
the footwells and side air vents)
5
Right rear center air vent, adjustable
6
Left rear center air vent, adjustableiThe climate control must be switched
on (
page 220).

229 Controls in detail
Climate control
Deactivating rear climate control
Press button´.
The indicator lamp on the button goes
out.
The cooling function switches off after
a short delay.Adjusting air distribution
Use the air distribution controls2 or4
to adjust the air distribution for the rear
passenger compartment.
The symbols on the controls represent the
following functions:
Adjusting manually

Press the desired air distribution
control2 or4.
The indicator lamp in the Ubutton
goes out.Adjusting automatically

Press buttonU.
The indicator lamp in the button comes
on. The air distribution is adjusted au-
tomatically.
Adjusting air volume
The air volume for the rear zone corre-
sponds to the air volume settings for the
front passenger side. You can switch off
the air supply for the rear zone.
You can switch off the supplied amount of
air volume.

Press button´.
iThe temperature is adjusted according
to the settings for the front passenger
side made on the front climate control
panel (
page 222).
iSwitch off the rear automatic climate
control for improved cooling or heating
output in the front passenger compart-
ment.
You can also switch off the rear auto-
matic climate control from the front
passenger compartment (
page 220).
Symbol
Function
Z
Directs air to the center air
vents
Y
Directs air to the footwells and
the side air vents

230 Controls in detail3-zone automatic climate control*

231 Controls in detail
3-zone automatic climate control*
1
Side air vent, adjustable
2
Thumbwheel for air volume control
for left side air vent
3
Left center air vent, adjustable
4
Right center air vent, adjustable
5
Thumbwheel for air volume control
for left center air vent
6
Thumbwheel for air volume control
for right center air vent
7
Thumbwheel for air volume control
for right side air vent
8
Side air vent, adjustable
9
Front passenger door air vent, fixed
a
Climate control panel
b
Driver’s door air vent, fixed
iFor draft-free ventilation, move the
sliders for the center air vents3
and4 to the middle position.

232 Controls in detail3-zone automatic climate control*
1
Temperature control, driver’s side
2
Air distribution and air volume
(automatic, manual)
3
Air distribution, driver’s side
4
Front defroster
0USA only
P Canada only
5
Increasing air volume
6
Rear window defroster
1 USA only
F Canada only
7
Air distribution, passenger side
8
Rear climate control
>USA only
™Canada only
9
Temperature control, passenger side
a
Automatic climate control on/off
b
Air distribution, passenger side
c
Air distribution, passenger side
d
AC cooling on/off
Residual heat/ventilation
e
Display
f
Decreasing air volume
g
Air recirculation
h
Air distribution, driver’s side
j
Air distribution, driver’s side
k
Interior temperature sensor
l
Adopting driver’s side settings for all
zones

233 Controls in detail
3-zone automatic climate control*
The automatic climate control is a 3-zone
intelligent climate control system. Your ve-
hicle interior is divided into 3 zones.With the help of a sun sensor, the climate
control determines the relation of the sun
to the vehicle and automatically adjusts
the inside temperature for each individual
zone.
The automatic climate control is operation-
al whenever the engine is running. It cools
the vehicle’s interior according to the an-
gle and intensity of the sun’s rays, the out-
side temperature and the selected
temperature. You can operate the auto-
matic climate control in either the auto-
matic or manual mode.
Nearly all dust particles, pollutants and
odors are filtered out before outside air en-
ters the passenger compartment through
the air distribution system.
The air conditioning will not engage (no
cooling) if the A/C mode is deactivated
(
page 242).
Warning!
G
When operating the automatic climate con-
trol, the air that enters the passenger com-
partment through the air vents can be very
hot or very cold (depending on the set tem-
perature). This may cause burns or frostbite
to unprotected skin in the immediate area of
the air vents.
Always keep sufficient distance between un-
protected parts of the body and the air
vents. If necessary, use the air distribution
controls (
page 232) to direct the air to air
vents in the vehicle interior that are not in
the immediate area of unprotected skin.

234 Controls in detail3-zone automatic climate control*
Deactivating the climate control system
Deactivating
Press button´ (
page 232) until
the display is cleared.Reactivating

Press buttonU(
page 232).
Warning!
G
Follow the recommended settings for heat-
ing and cooling given on the following pag-
es. Otherwise the windows could fog up,
impairing visibility and endangering you and
others.iSevere conditions (e.g. strong air pollu-
tion) may require replacement of the fil-
ter before its scheduled interval. A
clogged filter will reduce the air volume
to the interior.
If the vehicle interior is hot, ventilate
the interior before driving off, see
“Summer opening feature”
(page 251). The automatic climate
control will then adjust the interior
temperature to the set value much fast-
er.
Keep the air intake grille in front of the
windshield free of snow and debris.
Warning!
G
When the automatic climate control is
switched off, the outside air supply and cir-
culation are also switched off. Only choose
this setting for a short time. Otherwise the
windows could fog up, impairing visibility
and endangering you and others.
iYou can also press button´
(page 232) on the automatic climate
control panel.
If you press button0 (
page 232)
to reactivate the automatic climate
control system, the defrosting mode is
activated.