Page 94 of 273

91 Audio system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Audio and telephone, operation
These instructions are intended to help you become 
acquainted with your Mercedes- Benz car radio. They 
contain useful tips and a detailed description of the user 
functions.
The right to correct errors and make technical amendments is 
reserved.
Operating safety1 Optional equipment
Dolby and the double-D symbol 
Ù
 are trademarks of Dolby 
Laboratories Licensing Corporation. The Dolby noise reduction 
system is manufactured under licence from Dolby Laboratories 
Licensing Corporation.
Wa r n i n g !
In order to avoid distraction which could lead to an 
accident, system settings should be entered with 
the vehicle at standstill and systems should be 
operated by the driver only when 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 approximately 50 feet (approximately 
14 m )   e v e r y   s e c o n d .
Wa r n i n g !
Any alternations made to electronic components 
can cause malfunctionsThe radio, cassette deck, CD changer
1 and 
telephone
1 are interconnected. Therefore, when 
one of the components is defective or has not been 
removed / replaced properly this may impair the 
function of other components.
These malfunctions might seriously impair the 
operating safety of your vehicle.We recommend that you have any service work or 
alternations on electronic components done in an 
authorized Mercedes-Benz Center. 
     
        
        Page 95 of 273
92 Audio system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Operating and display elements
1On / off, volume, see page 95
2Telephone mode selector, see page 106
3Seek, see page 97, 100 and 104
4Radio mode selector, see page 97
5Tune, see page 97 and 98
Fast forward / reverse, see page 101 and 1046CD mode selector, see page 103
7Display panel, see page 99
8Alpha-numeric keypad for
station storage and frequency entry, see page 98
CD / Track access, see page 103 and 105
optional telephone, see page 106
9Function button, see page 98 and 105 
     
        
        Page 96 of 273
93 Audio system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index 10Soft keys for
radio band selection, see page 97
tone controls, see page 95
scan, see page 98
Tape eject, see page 100
Tape track select, see page 100
Dolby, see page 101
CD random / repeat, see page 105
11Tape mode selector, see page 99
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. 
     
        
        Page 97 of 273
94 Audio system
Te ch n ica 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:
Th e lock out time w il l only cou nt d own if th e ra dio is le ft 
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. 
     
        
        Page 98 of 273

95 Audio system
Te ch n ica l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Operation
Switching on and off
Press the control knob  .
Th e ra dio is switch ed of f wh en the ignition key is tu rned 
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 th e 
display.
Press the “+” key to increase 
or the “-” key to decrease the level. 
     
        
        Page 99 of 273
96 Audio system
Te ch n ica 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. 
     
        
        Page 100 of 273
97 Audio system
Te ch n ica 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
Pr e s s  e i t h e r  t h e    or    b u t ton . T h e  r a d io  w il l  t u n e  
to the next receivable station. F r e q u e n c y   r a n g e s : F M 8 7.9   -   10 7.9   M H z
AM 530 - 1710 kHz
WB approx. 162 MHz
FM 200 kHz
AM 10 kHz
WB Channels 1-7 
     
        
        Page 101 of 273

98 Audio system
Te ch n ica 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 97) 
will not be accepted. The frequency input mode is 
cancelled if no button is pressed within 4 seconds.