2001 MERCEDES-BENZ C320 radio

163 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Button and soft key operation
In these instructions, the alpha-numeric keypad (right
side of radio face) and the function buttons (left side of
the radio face) are referred to as “buttons” and the four
keys under the display are referred to as “soft keys”
Note:
Do not press directly on the radio display face.Operation
Switching on and off
Press the control knob .
The system is switched off when the electronic main key
in the starter switch is turned to position 0 or removed.
The radi o is swi tched on again when the electron ic main
key in the starter switch is turned to position 1 or 2.
Note:
The system can also be switched on separately with the
electronic main key removed, but will switch itself off
automatically after half an hour to conserve vehicle
battery power.

164 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Adjusting the volume
Turning the control knob clockwise will increase the
volume, counterclockwise will decrease the volume.
Note:
The volume setting can be selected separately for the
telephone, audio system and voice recognition system.
Audio fu nctions
The “AUD” key is used to select the BASS, TREBLE,
FADER and BALANCE functions. Settings for bass and
treble are stored separately for the radio, cassette and
CD modes. Tone level settings are identified by the
vertical bars. The center (flat) setting is shown by one
longer bar in the center of the display.Bass
Press the “AUD” key
repeatedly until “BASS”
appears on the display.
Press the “+” key to increase
or the “-” key to decrease the level.
Pressing the “+” and “-” keys simultaneously resets the
Bass to its center (flat) level.
Treble
Press the “AUD” key
repeatedly until “TREBLE”
appears on the display.
Press the “+” key to increase
or the “-” key to decrease the level.
Pressing the “+” and “-” keys simultaneously resets the
Treble to its center (flat) level.

166 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Audio system tone level selection
To select the tone level
settings for radio, cassette,
and CD operation press the
key “AUD”. The tone level
settings menu is now
displayed. Press key “EXT”, and “SOUND” appears on
the display.
Press the key “DRV” to adjust the sound to the “Driver”
position.
The key “SP” is for “Speech”, optimizing the sound for
spoken language.
The key “AMB” offers “Ambience” , a three-dimensional
sound.
The key “OFF” switches off the tone level setting
selection.Radio mode
Selecting radio mode
Press button.
Selecting the band
Press the key located below
the desired band. The band
selected is shown in the top
line of the display.
Frequency ranges: FM 87.9 -107.9 MHz
AM 530 -1710 kHz
WB approx.162 MHz

167 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Manual tuning
Press either the or
button. Step-by-step station
tuning in ascending or
descending order of
frequency will take place.
The first three tuning steps will take place without
muting. The radio will then be muted and high-speed
tuning will take place until the button is released.
The following tuning intervals will be shown on the
display:Seek tuning
Pre ss eit her t he or b utton. T he radi o will tun e
to the next receivable station.
Scan tuning
Press the button. Each
strongly receivable station on
the band selected will be
tuned in for 8 seconds. The
first scan will tune only the
stations with a high signal strength. The second scan
wi ll tune eve ry r ece ivable station . By pr ess in g e it her t he
, , , buttons or the button the
scan mode can be cancelled. FM 200 kHz
AM 10 kHz
WB Channels 1-7
SC #
SC #

170 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
The system will switch to
cassette mode. Track 1 will be
played and “SIDE 1”
displayed. Track 1 is the side
of the cassette which is facing
upward s. The c as sette d eck will automatically detect t he
type of tape and switch the equalization automatically.
A cassette symbol on the display indicates that a tape is
in the mechanism. This symbol appears in all modes
except cassette mode.
The cassette will not be ejected when the system is
switched off or another mode is selected.
If a cassette is in the mechanism, cassette mode can be
selected by using the button.
If no cassette has been inserted, the display will show
“NO TAPE”.Cassette eject
Press the button. The display will fold down and
the cassette will be ejected. Remove the cassette, then
fold the display back up manually. The system will
switch back to radio mode automatically.
Notes:
The cassette will not be ejected when the system is
switched of f. If a cassette is not ejected, continue to hold
the button for at least 5 seconds to eject the
cassette.
Important!
If the display is in the down position for more than
20 seconds, 2 successive beeps will be heard. This will
continue at 5 second intervals until the display is
returned to its normal position.
TAPE
EJ
EJ

173 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index CD mode
General notes on CD mode
Should excessive temperatures occur while in CD mode,
“ CD TEMP HIGH ” wi ll ap pear on t he d is play and m uti ng
will take place. The unit will then switch back to radio
mode until the temperature has decreased to a safe
operating level.
Should temperatures occur while in CD mode which are
too low, “CD TEMP LOW” will be displayed, but the CD
will play. It will be sensitive to skipping if you are
driving over rough roads.
Handle CDs carefully to prevent interference during
playback.
Avoid fingerprints and dust on CDs. Do not write on the
CDs or apply any label or other material or devices to
the CDs.
Clean CDs from time to time with a commercially
available cleaning cloth. No solvents, anti-static sprays,
etc. should be used. Replace the CD in its container after use. Protect CDs
from heat and direct sunlight.
1Optional equipmentWa r n i n g !
The CD changer
1 is a Class1 laser product. There is
a danger of invisible laser radiation if the cover is
opened or damaged.
Do not remove the cover. The CD changer
1 does not
contain any parts which can be serviced by the
user. For safety reasons, have any service work
which may be necessary performed only by
qualified personnel.

174 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
CD changer
1 installed
1CD changer
2CD magazine
3CD tray
4CD
If a CD changer1 is installed, it can be operated from the
front control panel of the radio. A loaded magazine must
be installed for CD playing.
1 Optional equipment
Loading/emptying the CD magazine
Slide the changer door to the right until it latches open
and press the eject button . The magazine will be
ejected. Remove the magazine. Pull out the CD tray to its
stop and place the CDs in the recess of the tray, label
side up. Push the tray into the magazine in the direction
shown by the arrow. Insert the loaded magazine into the
changer.
Important!
Close the door after the magazine has been inserted.
3
2
2
1
4

181 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Express-dialing
Press one of the number buttons - for more
than 1 second.
The phone number or the name stored at this memory
location will appear on the screen.
When the call is initiated, the call time will appear on
the display.
Note:
Please be aware that button might already be
reserved for an emergency call number, see page 183.
Call hold feature
While on the telephone, a second call can be accepted
by pressing the “SND” key. The first call will be put on
hold. Press “SND” to toggle between the calls.
An additional call can be accepted after ending one of
the previous calls.Accepting incoming call in telephone mode
With an incoming call, a
ringing tone can be heard and
the message “CALL” appears
on the display. Press the
“SND” key to answer the call.
Accepting incoming call in tape, CD or radio mode
If the telephone is activated in the background (symbol
“S” on the display), then a switch is made automatically
to the telephone mode when a call is received. The audio
source is muted, the ringing tone is heard and the
message “CALL” appears. Press the soft key “SND” to
answer the call. After the call has been terminated, the
previously selected audio source is resumed.
0OPR