2007 MERCEDES-BENZ C230 Owner's Manual

184 Controls in detail
Automatic climate control
Deactivating
Press buttone (page 175).
The indicator lamp on the button goes
out.
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 button2 or9
(
page 175).
The indicator lamp on the button goes
out.
The cooling function switches off after
a short delay.
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
procedure has begun. The windows and tilt/slid-
ing 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 position using the respective window
switch or tilt/sliding sunroof* switch after it was
closed with buttone. A window or tilt/slid-
ing sunroof* that was moved will remain in its
current position if buttone is used to
re-open the remaining 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.

185 Controls in detail
Automatic climate control
Activating
Moist air can fog up the windows. You can
dehumidify the air with the air condi-
tioning.
Press button2 or9
(
page 175) 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
(Canada only)
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.ActivatingSwitch off the ignition (page 32).
Press button9 (page 175).
The indicator lamp on the button
comes on.
Deactivating
Press button9 (page 175).
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 drops
!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.
iHow long the system will provide heating de-
pends 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.

186 Controls in detail
Automatic climate control
Rear passenger compartment
adjustable air vents
The air conditioning for the rear passenger
compartment is controlled via the auto-
matic climate control panel (
page 175).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.
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.

187 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.

188 Controls in detail
Audio system
Operating and display elements

189 Controls in detail
Audio system
ItemPage
1CD changer mode selector
AUX mode selector201
193
2Single CD mode selector 204
3Radio mode selector
4Mute function (radio)196
Pause (CD)208
5Volume distribution192
6Sound settings191
7Display
8Alphanumeric keypad
ItemPage
9Speed dialing memory
(telephone) in descending
order
aAccepting a call
(telephone)212
bTelephone mode selector208
cSpeed dialing memory
(telephone) in ascending
order210
dTerminating a call
(telephone)213
eCD slot
fCD ejection204
ItemPage
gSoft keys190
hVolume190
jSwitching on/off190
kManual tuning/seek tuning
(radio)195
Track search, reverse (CD)207
lManual tuning/seek tuning
(radio)195
Track search,
fast forward (CD)207

190 Controls in detail
Audio system
Button and soft key operation
In these instructions, the alphanumeric
keypad (right side of radio panel) and the
function buttons (left side of radio panel)
are referred to as “buttons”. The four keys
below the display panel are referred to as
“soft keys”.Operation
Switching the unit on/off
Switching on
Turn the SmartKey in the starter switch
to position1 or2.
If the audio system was on as you
removed the SmartKey from the starter
switch, the audio system will
automatically come back on as you
turn the SmartKey to position1 or2.
or
Press M button.Switching off
Remove SmartKey from starter switch.
or
Press M button.
Adjusting the volume
Turn rotary control of N button.
The volume will increase or decrease
depending on the direction turned.
!Do not press directly in the display face.
Otherwise, the display will be damaged.
iIf the radio is switched on without the Smart-
Key in the starter switch, it will automatically
switch off again after approx. 30 minutes.
If your vehicle is equipped with a telephone, the
display may prompt you to enter your PIN (GSM
network) or code (TDMA or CDMA network).
iShould excessively high temperatures occur
while the audio system is being operated, the
display will dim. If temperatures continue to rise,
HIGH TEMP will appear in the display, after which
the audio system will be switched off for a
cooling-down period.
iIf your vehicle equipment includes a Mer-
cedes-Benz specified mobile telephone*, you
can adjust its volume separately from the volume
of the audio system while the telephone is being
used.

191 Controls in detail
Audio system
Adjusting sound functions
The bass and treble functions are called up
by pressing the O button.
Settings for bass and treble are stored
separately for the AM and FM wavebands,
weather band, CD mode and telephone
mode.
Bass
Press O button repeatedly until
BASS appears in the display.
Press + or– soft key to increase or
decrease tone level accordingly.
or
Press RES soft key briefly to reset bass
tones to their center level.The radio switches back to the
standard radio menu 8 seconds after
the last soft key is pressed.
Adjusting treble
Press O button repeatedly until
TREBLE appears in the display.
Press + or– soft key to increase or
decrease tone level accordingly.
or
Press RES soft key briefly to reset treble
tones to their center level.
The radio switches back to the
standard radio menu 8 seconds after
the last soft key is pressed.Sound system*
You can either program the sound settings
manually (
page 191) or choose settings
via preset sound characteristics.
You can select from among the following
settings:

STANDARD: conventional stereo sound.

SURROUND: the sound is set for better
three-dimensional acoustic character-
istics.

SPEECH: the sound is optimized for the
spoken word.
Press O button repeatedly until
STANDARD, SURROUND, or SPEECH appears
in the display.
Press X or Y soft key repeatedly
until the desired sound setting has
been reached.
The sound is set accordingly.
or