2007 MERCEDES-BENZ C350 4MATIC Owner's Manual

168 Controls in detail
Climate control
Setting the temperature
Use temperature controls2 and3
(
page 165) to separately adjust the air
temperature on each side of the passenger
compartment. You should raise or lower
the temperature setting in small incre-
ments, preferably starting at 72°F (22°C).
The climate control will adjust to the set
temperature as fast as possible.
Increasing
Turn temperature control2
and/or3 (
page 165) slightly clock-
wise.
The climate control system will corre-
spondingly adjust the interior air tem-
perature.Decreasing
Turn temperature control2
and/or3 (
page 165) slightly coun-
terclockwise.
The climate control system will corre-
spondingly adjust the interior air tem-
perature.
Adjusting air distribution and volume
Use air distribution control4
(
page 165) to adjust the air distribution.
The following symbols are located on the
controls:
iIf you turn the temperature control fully
clockwise for one side of the vehicle, you are in-
creasing the temperature for the other side of
the vehicle as well.
iIf you turn the temperature control fully
counterclockwise for one side of the vehicle, you
are decreasing the temperature for the other
side of the vehicle as well.
SymbolFunction
aDirects air through the center,
side and rear passenger
compartment air vents
ZDirects air to the windshield
and the side defroster vents
bDirects air into the entire
vehicle interior
YDirects air to the footwells

169 Controls in detail
Climate control
Press buttonU (page 165).
The indicator lamp on the button goes
out. The automatic air distribution is
switched off. The air distribution is
controlled according to the selected
control setting.
Turn air distribution control 4
(
page 165) to the desired symbol.
Opening center and side air vents
Turn thumbwheels 3, 4, 7 and 8
(
page 164) upward.
The center air vents 5 and 6 and side
air vents 2 and 9 are open.
Closing center and side air vents
Turn thumbwheels 3, 4, 7 and 8
(
page 164) downward.
The center air vents 5 and 6 and side
air vents 2 and 9 are closed.
Adjusting air volume
Six blower speeds are available.
Press buttonU (page 165).
The indicator lamp in the button goes
out. The automatic air volume control
is switched off. The air volume is
adjusted according to the currently
selected setting.
Use the air volume control1
(
page 165) to adjust the air volume.
Front defroster
You can use this setting to defrost the
windshield, for example if it is iced up.
You can also defog the windshield and the
side windows.
Activating
Press buttonP or0
(
page 165).
The indicator lamp on the button
comes on.
The air conditioning switches
automatically to the following functions:

maximum blowing and heating
power

air flows onto the windshield and
the front side windows

the air recirculation mode is
switched off
iKeep this setting selected only until the
windshield or the side windows are clear again.

170 Controls in detail
Climate control
Deactivating
Press buttonP or0
(
page 165) again.
The indicator lamp on the button goes
out. Defrosting is turned off.
Windshield fogged on the outside
Switch the windshield wipers on
(
page 51).
If the automatic mode of the climate con-
trol is switched off:
Turn air distribution control4
toaorY (
page 165).
Air recirculation mode
Switch to air recirculation mode to prevent
unpleasant odors from entering the vehicle
from the outside (e.g. before driving
through a tunnel). This setting cuts off the
intake of outside air and recirculates the
air in the passenger compartment.Activating
Press button, (page 165).
The indicator lamp on the button
comes on.
iIf you have switched on the defrost function
using thePor0 button, you cannot
make any other settings.
iThe cooling remains switched on.
iKeep this setting selected only until the
windshield is clear again.
Warning!G
Fogged windows impair visibility, endanger-
ing 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 window
fogging persists, make sure the air
conditioning (
page 172) is activated, or
press buttonP or 0.
iThe 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.

171 Controls in detail
Climate control
Deactivating
Press button, (page 165).
The indicator lamp on the button goes
out.
Air recirculation mode with conve-
nience closing or opening featureConvenience closingPress button, (page 165) for
approximately 2 seconds.
The windows and tilt/sliding sunroof*
will close. You can release button,
once the closing procedure has begun.
The windows and tilt/sliding sunroof*
continue closing until they are fully
closed. The indicator lamp on the but-
ton comes on. The air recirculation
mode is activated.
Convenience opening
Press button, for approximately
2 seconds.
The windows and tilt/sliding sunroof*
will return to their previous position.
You can release button , once the
opening procedure has begun. The win-
dows and tilt/sliding sunroof continue
opening until they have reached their
previous position. The indicator lamp
on the button goes out. The air recircu-
lation mode is deactivated.
iThe air recirculation mode is deactivated au-
tomatically:

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

after 5 minutes if the air conditioning 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 the
tilt/sliding sunroof* if there is the possibility
of anyone being harmed by the closing pro-
cedure.
When using the air recirculation mode with
convenience closing feature, should the up-
ward movement of a window be blocked by
some obstructions including but not limited
to arms, hands, fingers. etc., the automatic
reversal feature will not operate.
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 closing of the tilt/sliding
sunroof* can be immediately halted by
moving the tilt/sliding sunroof* switch in
the overhead control panel in any direction.
The closing of the side windows and
tilt/sliding sunroof* can be reversed by
again pressing and holding the, button.

172 Controls in detail
Climate control
Air conditioning
The cooling function, only operational
when the engine is running, cools the vehi-
cle interior down to the selected tempera-
ture. The cooling function also
dehumidifies the air in the vehicle interior,
thus preventing the windows from fogging
up.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 165).
The indicator lamp on the button goes
out.
The cooling function switches off after
a short delay.Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condition-
ing.
Press button2 (page 165).
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.
iA side window or tilt/sliding sunroof* will
only return to its previous position if it has not
been moved to another position using the re-
spective side window switch or tilt/sliding sun-
roof* switch after it was closed with
button,. A side window or tilt/sliding sun-
roof* that was moved will remain in its current
position if button, is used to re-open the re-
maining side windows or tilt/sliding sunroof*.
iCondensation may drip out from underneath
the vehicle. This is normal and not an indication
of a malfunction.
Warning!G
If you turn off the cooling function, the
vehicle will not be cooled when weather
conditions are warm. The windows can fog
up more quickly. Window fogging may
impair visibility and endanger you and
others.
!If the air conditioning cannot be turned on
again, this indicates that the air conditioning is
losing refrigerant. The compressor has turned it-
self off.
Have the air conditioning checked at the nearest
authorized Mercedes-Benz Center.

173 Controls in detail
Climate control
Rear passenger compartment
adjustable air vents
The air conditioning for the rear passenger
compartment is controlled via the climate
control panel (
page 165).
The air vents for the rear passenger
compartment are located in the rear
center console.1Left center air vent
2Thumbwheel for air volume control for
center air vents
3Right center air ventAdjusting air distribution
Push the slide for the left center
vent1 or right center vent3 to the
left, right, up, or down.
The air flow is directed in the corre-
sponding direction.
Adjusting air volume
Turn thumbwheel2 up or down.
The air volume is increased or
decreased.
iThe temperature at the center air vents1
and3 for the rear passenger compartment is
the same as at the dashboard center air vents.
iFor draft-free ventilation, move the sliders
for the center air vents1 and3 upward.

174 Controls in detail
Automatic climate control
USA standard equipped with automatic climate control, depending on vehicle production date.
Automatic climate control* optional for Canada.

175 Controls in detail
Automatic climate control
USA only (depending on vehicle production
date)
Canada only
Item
1Left side defroster vent, fixed
2Left side air vent, adjustable
3Thumbwheel for air volume control
for left side air vent
4Thumbwheel for air volume control
for left center air vent
5Left center air vent, adjustable
6Right center air vent, adjustable
7Thumbwheel for air volume control
for right center air vent
8Thumbwheel for air volume control
for right side air vent
9Right side air vent, adjustable
aRight side defroster vent, fixed
bAutomatic climate control panel
iFor draft-free ventilation, move the sliders
for the center air vents and side air vents to the
middle position.
Item
1Left side air distribution control
2Front defroster
3Temperature control, left, raising
4Display
5Air volume control, raising
6Temperature control, right, raising
7Rear window defroster
8Right side air distribution control
9Charcoal filter
aAC cooling on/off
Residual heat/ventilation
bTemperature control, right, lowering
cAir volume control, lowering
dTemperature control, left, lowering
eAir recirculation
fAutomatic climate control on/off
(complete system)
gAir distribution and air volume
(automatic mode)