key MERCEDES-BENZ SLK320 2002 R170 Service Manual

91 Climate control
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Air recirculation
This mode can be selected to temporarily reduce the
entry of annoying odors or dust into the vehicle’s
interior.
Outside air is not supplied to the vehicle’s interior.
To s el ect , p res s O button.
To cancel, press O button again.
The system will automatically switch from recirculated
air to fresh air
•after approximately 5 minutes at outside
temperatures below approximately 40°F (5°C),
•after approximately 30 minutes, at outside
temperatures above approximately 40°F (5°C),
•after approximately 5 minutes, if button S is
pressed.
At high outside temperatures, the system automatically
engages the recirculated air mode for approximately
30 minutes, thereby increasing the cooling capacity
performance. Press O button again to extend the
recirculated air mode.Residual engine heat utilization (REST)
With the engine switched off, it is possible to continue
heating the interior for a short while.
Air volume is controlled automatically. Select
temperature for each side of the passenger
compartment. Set air distribution control switch to the
desired position.
To s e l e c t :
Turn key in steering lock to position 1 or 0 or remove.
Press O button. Indicator lamp in the button lights
up.
This function selection will not activate if the battery
charge level is insufficient.
To c a n c e l :
Press O button. Indicator lamp in the button goes
out.
The system will automatically shut off
•if you turn key in steering lock to position 2,
•after approximately 30 minutes,
•if the battery voltage drops.

94 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Operating and display elements
1On / off, volume, see page 97
2Telephone mode selector, see page 108
3Seek, see page 99, 102 and 106
4Radio mode selector, see page 99
5Tune, see page 99 and 100
Fast forward / reverse, see page 103 and 1066CD mode selector, see page 105
7Display panel, see page 101
8Alpha-numeric keypad for
station storage and frequency entry, see page 100
CD / Track access, see page 105 and 107
optional telephone, see page 108
9Function button, see page 100 and 107


95 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index 10Soft keys for
radio band selection, see page 99
tone controls, see page 97
scan, see page 100
Tape eject, see page 102
Tape track select, see page 102
Dolby, see page 103
CD random / repeat, see page 107
11Tape mode selector, see page 101
Anti-theft system
If the power supply to the
radio has been
interrupted,“CODE” will
appear on the display when it
is next switched on. The radio
will only work after the five-digit code has been entered
using the buttons on the right-hand control panel.The code number is shown on the Radio code card,
supplied with the radio.
Important!
Never leave the Radio code card in the vehicle. Keep it in
a safe place.

96 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Entering the code number
Switch on the radio.“CODE” will appear on the display.
Using the buttons on the alpha-numeric keypad, enter
the five digit code. Confirm by pressing the “OK” key.
If an incorrect code has been entered and confirmed,
“CODE” will reappear on the display. The correct code
must be entered once again.
If an incorrect code is entered
three times, “WAIT” will
appear on the display and the
radio will be locked out for
about 10 minutes.
Note:
The lock out time will only count down if the radio is left
switched on.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.

97 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Operation
Switching on and off
Press the control knob .
The radio is switched off when the ignition key is turned
to position 0 or removed from the ignition. The radio is
switched on again when the ignition key is turned to
position 1 or 2.
Note:
The radio can also be switched on even if the ignition
key is not inserted, but will switch itself off
automatically after one hour to conserve vehicle battery
power.
Adjusting the volume
Turn the control knob - turning the knob clockwise will
increase the volume, counterclockwise will decrease the
volume.Audio functions
The AUD key is used to select the BASS, TREBLE and
BALANCE functions. Settings for bass and treble are
stored separately for the 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 in the
display.
Treble
Press the AUD key repeatedly
until “TREBLE” appears in the
display.
Press the “+” key to increase
or the “-” key to decrease the level.

98 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Balance
Press the AUD key repeatedly
until “BALANCE” appears in
the display.
Press the “L” key to move the
sound to the left speaker or the “R” key to move the
sound to the right speaker.Centering all audio functions
Push and hold down the
“AUD” key. All audio
functions (bass, treble and
balance) are set to center or
flat positions, and the volume
is adjusted to a pre-set level.

99 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index 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.Manual tuning
Press either the or
button. Step-by-step 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
Press either the or button. The radio will tune
to the next receivable station. Frequency ranges: FM 87.9 - 107.9 MHz
AM 530 - 1710 kHz
WB approx. 162 MHz
FM 200 kHz
AM 10 kHz
WB Channels 1-7

100 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Scan tuning
Press the SC key. Each strong
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 will tune every
receivable station. By pressing either the , ,
or buttons, or the “SC” key the scan mode
can be cancelled.
Station memory
Ten stations can be stored in
the AM and FM bands via the
alpha-numeric keypad. The
“0” button corresponds to
location 10. Weatherband
(WB) channels 1 to 7 can be retrieved via the alpha-
numeric keypad and are preset at the factory.Storing stations
Hold the 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 99)
will not be accepted. The frequency input mode is
cancelled if no button is pressed within 4 seconds.

101 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Cassette mode
Playing cassettes
Press the “TAPE” button. When the eject (EJ) key is
pressed, the display folds down and the cassette slot
becomes visible. Push the cassette into the slot until it
engages. The cassette will be pulled in automatically.
Notes:
Do not press directly on the radio 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.
When playing mono recorded tapes (e.g. books) through
a stereo system the sound from one track might bleed to
the other track, despite setting the balance to the full
left or full right speakers.
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.The radio 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
upwards. The cassette deck will automatically detect the
type of tape and switch the equalization automatically.
A cassette symbol in the display indicates that a tape is
in the mechanism. This symbol appears in all modes but
not in cassette mode.
The cassette will not be ejected when the radio is
switched off or another mode is selected.
If a cassette is in the
mechanism, cassette mode
can be selected by using the
“TAPE” button. If no cassette
has been inserted, the display
will show “NO TAPE”.

102 Audio system
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Cassette eject
Press the eject (EJ) key. The display will fold down and
the cassette will be ejected. Remove the cassette, then
fold the display back up manually. The radio will switch
back to radio mode automatically.
Note:
The cassette will not be ejected when the radio is
switched off.
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.
Track selection
Press the track selection
(TRK) key. The current track
will be displayed as “SIDE 1”
or “SIDE 2”. The track will be
changed automatically at the
end of the tape.Track search forwards / backwards
Press the button.
“SEEK FWD” will be shown on
the display and the track
search will run the tape
forwards to the start of the
next track.
Press the button.
“SEEK RWD” will be shown
on the display and the track
search will run the tape
backwards to the start of the
track currently playing. Track search can be interrupted
by pressing the same button again.
Note:
The beginning of a track can only be located if there is a
break of at least 4 seconds between tracks.