2007 MERCEDES-BENZ R320CDI climate control

229 Controls in detail
Climate control
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
Switch off the ignition (page 39).
Press button9 (page 220).
The indicator lamp on the button
comes on.
Deactivating
Press button9 (page 220) again.
The indicator lamp on the button goes
out.
Rear climate control*
The control panel for the rear climate
control is only available if your vehicle is
equipped with seat heating for the
second-row seats*.
The control panel is located on the rear of
the front center console.
iHow long the system will provide heating
depends on

the coolant temperature

the battery voltage
Regardless of the temperature and air volume
set on the climate control panel, an interior tem-
perature is aimed at by 72°F (22°C) and the
blower runs on low speed to protect the vehicle
battery.
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

230 Controls in detail
Climate control
Rear 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.
Deactivating rear climate control
Press button´.
The indicator lamp on the button goes
out.
The cooling function switches off after
a short delay.
1Rear climate control on
(automatic mode)
2Air distribution (directs air through
the center air vents)
3Rear air conditioning off
4Air distribution (directs air through
the footwells and side air vents)
5Right rear center air vent, adjustable
6Left rear center air vent, adjustable
iThe climate control must be switched on
(
page 231).
iThe temperature is adjusted according to
the settings for the front passenger side made
on the front climate control panel (
page 223).
iSwitch off the rear climate control for
improved cooling or heating output in the front
passenger compartment.
You can also switch off the rear climate control
from the front passenger compartment
(
page 231).

231 Controls in detail
Climate control
Operating from the front
Deactivating
Press button: on the front climate
control panel (
page 220).
The indicator lamp on the button
comes on.
Reactivating
Press button: on the front climate
control panel (
page 220).
The indicator lamp on the button goes
out. The rear climate control is
adjusted automatically.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 on buttonU
goes out.Adjusting automatically
Press buttonU.
The indicator lamp on the button
comes on. The air distribution is
adjusted automatically.
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´.
The indicator lamp on the button
comes on.
SymbolFunction
ZDirects air to the center air
vents
YDirects air to the footwells and
the side air vents

232 Controls in detail
3-zone automatic climate control*

233 Controls in detail
3-zone automatic climate control*
1Left side air vent, adjustable
2Thumbwheel for air volume control
for left side and door air vent
3Left center air vent, adjustable
4Right center air vent, adjustable
5Thumbwheel for air volume control
for left center air vent
6Thumbwheel for air volume control
for right center air vent
7Thumbwheel for air volume control
for right side and door air vent
8Right side air vent, adjustable
9Front passenger door air vent, fixed
aAutomatic climate control panel
bDriver’s door air vent, fixed
iFor draft-free ventilation, move the sliders
for center air vents and side air vents to the
middle position.

234 Controls in detail
3-zone automatic climate control*
1Temperature control, driver’s side
2Air distribution and air volume
(automatic, manual)
3Air distribution, driver’s side
4Front defroster
0USA only
P Canada only
5Increasing air volume
6Rear window defroster
1 USA only
F Canada only
7Air distribution, passenger side
8Rear automatic climate control
on/off
>USA only
™Canada only
9Temperature control, passenger side
aAutomatic climate control on/off
bAir distribution, passenger side
cAir distribution, passenger side
dAC cooling on/off
Residual heat/ventilation
eDisplay
fDecreasing air volume
gAir recirculation
hAir distribution, driver’s side
jAir distribution, driver’s side
kInterior temperature sensor
lAdopting driver’s side settings for all
zones

235 Controls in detail
3-zone automatic climate control*
The automatic climate control is a 3-zone
intelligent automatic climate control
system. Your vehicle interior is divided
into 3 zones.With the help of a sun sensor, the
automatic climate control determines the
relation of the sun to the vehicle and auto-
matically adjusts the inside temperature
for each individual zone.
The automatic climate control is oper-
ational whenever the engine is running. It
cools the vehicle’s interior according to the
angle and intensity of the sun’s rays, the
outside temperature and the selected tem-
perature. You can operate the automatic
climate control in either the automatic or
manual mode.
Nearly all dust particles, pollutants and
odors are filtered out before outside air
enters the passenger compartment
through the air distribution system.
The air conditioning will not engage (no
cooling) if the A/C mode is deactivated
(
page 243).
Warning!G
When operating the automatic climate
control, the air that enters the passenger
compartment through the air vents can be
very hot or very cold (depending on the set
temperature). This may cause burns or frost-
bite to unprotected skin in the immediate
area of the air vents.
Always keep sufficient distance between
unprotected parts of the body and the air
vents. If necessary, use the air distribution
controls (
page 234) to direct the air to air
vents in the vehicle interior that are not in
the immediate area of unprotected skin.

236 Controls in detail
3-zone automatic climate control*
Deactivating the automatic climate
control system
Deactivating
Press button´ (page 234) until
the displaye (
page 234) is cleared.
The indicator lamp on the button
comes on.Reactivating
Press buttonU (page 234).Warning!G
Follow the recommended settings for heat-
ing and cooling given on the following
pages. Otherwise the windows could fog up,
impairing visibility and endangering you and
others.
iSevere conditions (e.g. strong air pollution)
may require replacement of the filter 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 fea-
ture” (
page 254). The automatic climate
control will then adjust the interior temperature
to the set value much faster.
Keep the air intake grille in front of the wind-
shield free of snow and debris.
Warning!G
When the automatic climate control system
is switched off, the outside air supply and
circulation 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 234) on the automatic climate control
panel.
If you press button0 (
page 234) to reacti-
vate the automatic climate control system, the
defrosting mode is activated.