2001 MERCEDES-BENZ C320 lock

133 Exterior lamp switch
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Locator lighting
After unlocking the vehicle with the electronic main key
during darkness, the fog lamps, parking lamps,
taillamps and license plate lamps switch on for
approximately 40 seconds.
The exterior lamps will be switched off when opening
the driver’s door.
See “Individual settings” – “LIGHTING” on page 117 for
instructions on how to activate the function. Headlamp cleaning system
Turn the electronic key in starter switch to position 1.
The headlamps will be cleaned with a high-pressure
water jet when you press the headlamp washer
button (1).
See page 302 for instructions on filling up the
windshield/headlamp washer reservoir.

136 Combination switch
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Blocked windshield wipers
If the windshield wipers become blocked (for example,
due to snow), switch off the wipers.
For safety reasons before removing ice or snow, remove
electronic key from starter switch. Remove blockage.
Activate combination switch again (electronic key in
starter switch position 1).
Emergency operation of windshield wipers
In case of windshield wiper malfunction in switch
positions I or III, turn combination switch to wiper
setting II. Have the system checked at your authorized
Mercedes-Benz Center as soon as possible.Windshield wipers smear
If the windshield wipers smear the windshield, even
during rain, activate the washer system as often as
necessary. The fluid in the washer reservoir should be
mixed in the correct ratio.
See page 302 for instructions on filling up the
windshield washer reservoir.
Windshield and headlamp washer fluid mixing ratio
For temperatures above freezing:
MB Windshield Washer Concentrate “S” and water.
1 part “S” to 100 parts water
(40 ml “S” to 1 gallon water).
For temperature below freezing:
MB Windshield Washer Concentrate “S” and
commercially available premixed windshield washer
solvent / antifreeze
1 part “S” to 100 parts solvent
(40 ml “S” to 1 gallon solvent).

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.

169 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Storing stations
Hold the desired number button - down for
approximately 2 seconds. The currently displayed
frequency is stored on the selected station button. The
storage procedure is confirmed by a short signal tone.
Retrieving a station from memory
Press the desired station button - .
Direct frequency input (AM and FM only)
Select the band. Press the
“ button and enter the
desired frequency using the
alpha-numeric keypad -
. Frequencies outside of
the frequency ranges (frequencies specified on
page 166) will not be accepted. The frequency input
mode is cancelled if no button is pressed within
4seconds.Cassette mode
Playing cassettes
Pre ss t he button. When t he b utton is pr ess ed ,
the display folds down and the cassette slot becomes
visible. Push the cassette gently into the slot until it
engages. The cassette will be pulled in automatically.
Note:
Do not press directly on the display face.
Return the display panel to its normal position by
folding it back up and pressing gently on the display
frame to lock in place.
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.
0OPR0OPR
0OPR
TAPE
EJ

178 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.
Entering telephone number and starting dialing
process
Enter the desired telephone
number using the alpha-
numeric keypad. The number
can have up to 32 digits, but
only 13 of these can be
displayed. The dialing process is started by pressing the
“SND” key. The entered number can be corrected using
the “CLR” key.
Press the “CLR” key briefly, and the last digit will be
deleted.
Press and hold the “CLR” key, and the complete number
will be deleted.Calling up the telephone book
The numbers stored in the telephone number memory
can be called up via either name or number entries. The
memory contents from the portable telephone must
contain numbers and names in at least one memory
location and the portable telephone must be connected
to the vehicle coil cord in order to call up the telephone
book. Refer to the “Memory download” section of the
cellular telephone operation guide for more information.
Switching between name search and number search
Press “ABC” key - Name search
Press “NUM” key - Number search

183 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Emergency call
Important!
If you press button for more than 1 second, the
number stored in memory location 1 (for example 911)
will be dialed.
The 911 emergency call system is a public service.
Using it without due cause is a criminal offence.
You can make an emergency call to an emergency
rescue station with a mobile communications network.
The emergency call will be placed as long as the
corresponding mobile communications network is
available. To do this, switch the telephone on if you have
not already done so.
The call will also be placed if the unlock-code is not
entered.Emergency calls may not be possible with all telephone
networks or if certain network services and/or
telephone functions are active. Check with your local
network operating company. It may take some time to
set up an emergency call.
To use this function you must ensure that the number
stored in memory location 1 is the number to be dialed
in case of emergency.
Note:
If an emergency call cannot be
connected, the message
“SYSTM BUSY” appears.

185 Interior equipment
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Express opening and closing
Press or pull switch past resistance point and release –
window opens or closes completely.
To interrupt procedure, briefly press or pull switch.
If the upward movement of the window is blocked
during the closing procedure, the window will stop
during the last few inches before closure and open
slightly.
When pulling and holding the switch to close the
window, and upward movement of the window is
blocked during the last few inches before closure, it will
stop but not
open slightly.
Note:
The power windows can also be opened and closed
using the convenience opening / closing feature, see
page 29.
Wa r n i n g !
When closing the windows, be sure that there is no
danger of anyone being harmed by the closing
procedure.In case of obstruction, the automatic reversal will
not operate if a window is being closed by pulling
the switch to its resistance point and holding it
there, or when using the electronic main key.The closing procedure can be immediately reversed
by either pressing or pulling the switch, or
pressing buttonΠon the electronic main key
and holding it.When leaving the vehicle, always remove the
electronic key from starter switch, and lock your
vehicle. Do not leave children unattended in the
vehicle, or with access to an unlocked vehicle.
Unsupervised use of vehicle equipment can cause
serious personal injury.

186 Interior equipment
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Blocking of rear door window operation
The switch (1) is located on the driver’s door.
If no operation of the rear windows by switch (for
instance by children) is desired, slide override
switch (1) to the right; the N symbol becomes
visible.
Operation of the rear door windows with the switches
located in the driver’s door is still possible.Synchronizing power windows
If the power supply was interrupted, (battery
disconnected or low), the windows cannot be opened or
closed by the express feature.
To resynchronize the express feature, pull switch until
the window is completely closed and hold for
approximately 1 second. Repeat procedure for each
window.
The automatic full opening and closing procedure of the
windows should now be restored.