MERCEDES-BENZ C350 4MATIC 2006 W203 Owner's Manual

190 Controls in detailAutomatic climate control* (Canada only)Deactivating
Press buttonU (
page 187) again.
The indicator lamp on the button goes
out. The automatic operation of air vol-
ume and air distribution switches off.
Setting the temperature
Use temperature controls3 andd for
the left side or6 andb for the right side
(page 187) 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 22°C (72°F).
The climate control will adjust to the set
temperature as fast as possible.Increasing

Press temperature button3
and/or6 (
page 187) until the de-
sired temperature appears in the con-
trol panel display4 (
page 187).
The automatic climate control system
will correspondingly adjust the interior
air temperature.
Decreasing

Press temperature buttonb
and/ord (
page 187) until the de-
sired temperature appears in the con-
trol panel display4 (
page 187).
The automatic climate control system
will correspondingly adjust the interior
air temperature.
Adjusting air distribution
Use air distribution controls1 and8
(page 187) to separately adjust the air
distribution on each side of the passenger
compartment. The following symbols are
found on the controls:Symbol
Function
a
Directs air through the center,
side and rear passenger
compartment air vents
Z
Directs air to the windshield
and the side defroster vents
b
Directs air into the entire
vehicle interior
Y
Directs air to the footwells

191 Controls in detail
Automatic climate control* (Canada only)

Turn air distribution control1 or8
(page 187) to the desired symbol.
The indicator lamp on the buttonU
(page 187) goes out.
The automatic air distribution is
switched off. The air distribution is
controlled according to the selected
control setting.
Opening center and side air vents

Turn thumbwheels 3, 4, 7 and 8
(page 186) upward.
The center air vents 5 and 6 and side
air vents 2 and 9 (
page 187) are
open.Closing center and side air vents

Turn thumbwheels 3, 4, 7 and 8
(page 186) downward.
The center air vents 5 and 6 and side
air vents 2 and 9 (
page 186) are
closed.
Adjusting air volume
Use buttonU (
page 187) for auto-
matic mode or air volume controls

orQ (
page 187) to adjust air volume
manually.
Seven blower speeds are available.

Press button
to decrease
orQ (
page 187) to increase air
volume to the desired level.
The indicator lamp on the buttonU
goes out.
The automatic air distribution remains
switched on.
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(
page 187).
The indicator lamp on the button
comes on.
iYou can also turn the air distribution
control to a position between two sym-
bols.
iKeep this setting selected only until the
windshield or the side windows are
clear again.

192 Controls in detailAutomatic climate control* (Canada only)The air conditioning switches
automatically to the following functions:


cooling on to dehumidify


maximum blowing and heating
power


air flows onto the windshield and
the front side windows


the air recirculation mode is
switched off
Deactivating

Press buttonP (
page 187) again.
The indicator lamp on the button goes
out.
The previous settings are once again in
effect.Windshield fogged on the outside

Switch the windshield wipers on
(page 54).
If the automatic mode of the climate con-
trol is switched off:

Turn air distribution control1 or8
toa orY (
page 187).
Maximum cooling MAXCOOL
If the left and right air distribution controls
as well as the airflow volume control are
set toU (
page 187) and there is a
high need for cooling, the display
“MAXCOOL” appears.
This provides the fastest possible cooling
of the vehicle interior (when side windows
and tilt/sliding sunroof* are closed).
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.
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 187) is activated, or
press buttonP.

193 Controls in detail
Automatic climate control* (Canada only)
Activating
Press button, (
page 187).
The indicator lamp on the button
comes on.
iThe air recirculation mode is activated
automatically at high outside tempera-
tures.
The indicator lamp on the button,
is not lit when the air recirculation
mode is automatically switched on.
A quantity of outside air is added after
approximately 30 minutes.
Warning!
G
Never operate the side windows and the
tilt/sliding sunroof* if there is the possibility
of anyone being harmed by the closing
procedure.
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,.
iPress and hold button, for approx.
2 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.

194 Controls in detailAutomatic climate control* (Canada only)Deactivating
Press button, (
page 187) again.
The indicator lamp on the button goes
out.
Charcoal filter
An activated charcoal filter markedly
reduces bad odors and removes pollutants
from air entering the passenger compart-
ment. The charcoal filter can be activated
or deactivated.
The system switches automatically to the
air recirculation mode, if the

charcoal filter is switched on


carbon monoxide (CO) or nitrogen
oxide (NO
X) concentration of the out-
side air increases beyond a predeter-
mined level
iThe air recirculation mode is deactivat-
ed automatically:

after 5 minutes if the outside tem-
perature is below
approximately 5°C (41°F)


after 5 minutes if the air condition-
ing is turned off


after 30 minutes if the outside tem-
perature is above approximately
5°C (41°F)
iPress and hold button, for approx.
2 seconds. The side windows and or
tilt/sliding sunroof* will return to their
previous position. 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, is used to re-open
the remaining windows or tilt/sliding
sunroof*.
iThe automatic air recirculation mode
does not function if theA/C mode is
deactivated (indicator lamp on
button9 not lit), or if the
outside temperature has fallen
below 5°C (41°F).

195 Controls in detail
Automatic climate control* (Canada only)
Activating
Press buttone (
page 187).
The indicator lamp on the button
comes on.
Deactivating

Press buttone (
page 187).
The indicator lamp on the button goes
out.
iThe activated charcoal filter should be
switched off when windows fog up on
the inside, or if the passenger compart-
ment needs to be quickly heated or
cooled down.iThe activated charcoal filter should be
switched off when windows fog up on
the inside, or if the passenger compart-
ment needs to be quickly heated or
cooled down.
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.
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 buttone.
iPress and hold buttone for approx.
2 seconds. The side windows and or
tilt/sliding sunroof* will return to their
previous position. You can release
buttone 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 buttone. A
window or tilt/sliding sunroof* that
was moved will remain in its current po-
sition if buttone i s us ed to re -open
the remaining windows or tilt/sliding
sunroof*.

196 Controls in detailAutomatic climate control* (Canada only)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 automatic
climate control system. The air in the
vehicle will then no longer be cooled or
dehumidified.

Press button9 (
page 187).
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 condi-
tioning.

Press button9 (
page 187) 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.
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
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 itself off.
Have the air conditioning checked at
the nearest authorized Mercedes-Benz
Center.

197 Controls in detail
Automatic climate control* (Canada only)
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 33).

Press button9 (
page 187).
The indicator lamp on the button
comes on.
Deactivating

Press button9 (
page 187).
The indicator lamp on the button goes
out.
The residual heat is automatically turned
off:


when the ignition is switched on


after about 30 minutes


if the battery voltage dropsRear passenger compartment
adjustable air vents
The air conditioning for the rear passenger
compartment is controlled via the auto-
matic climate control panel (
page 187).
iHow long the system will provide
heating depends on

the coolant temperature


the temperature set by the operator
The blower will run at speed setting 1
regardless of the air distribution
control setting.
iThe temperature at the center air vents
for the rear passenger
compartment1 and3 i s t h e s a m e a s
at the dashboard center air vents.

198 Controls in detailAutomatic climate control* (Canada only)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
corresponding direction.
Adjusting air volume

Turn thumbwheel2 up or down.
The air volume is increased or
decreased.iFor draft-free ventilation, push
slides1 and3 upward.

199 Controls in detail
Audio system
Audio system
Audio and telephone, operation
These instructions are intended to help
you become familiar with your
Mercedes-Benz audio system. They con-
tain useful tips and a detailed description
of the user functions.
Operating safety
Warning!
G
In order to avoid distraction which could
lead to an accident, the driver should enter
system settings with the vehicle at a
standstill and operate the system only when
road and traffic conditions permit. Always
pay full attention to traffic conditions first
before operating system controls while
driving.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h), your car is
covering a distance of 44 feet
(approximately 14 m) every second.
Warning!
G
Any alterations made to electronic
components can cause malfunctions.
The radio, amplifier, CD changer*, satellite
radio*, and telephone* are interconnected.
When one of the components is not opera-
tional or has not been removed/replaced
properly, the function of other components
may be impaired.
This condition might seriously impair the
operating safety of your vehicle.
We recommend that you have any service
work on electronic components carried out
by an authorized Mercedes-Benz Center.