Page 151 of 354

148 Audio system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
CD changer installed (optional)
1CD changer
1 
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 and press the eject 
button  . The magazine will be ejected. Remove the 
magazine. Pull out the CD tray until its stop is reached 
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.
Playing CDs
Press the CD button. The CD most recently played will 
start at the point where it was last switched off. CDs 
stored in the magazine can be selected by using the 
station prese t buttons 1-6.
The magazine slot number of 
the selected CD will then be 
displayed after “CD”. The 
number of the track being 
played will be displayed after 
“TRACK”.
3
2
2
1
4 
     
        
        Page 152 of 354

149 Audio system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index If there is no CD in the 
selected magazine slot, 
“NO CD” and the 
corresponding slot number 
will be displayed 
(e.g.“NO CD3”). After the last track on a CD has been 
played, the next CD will automatically be selected and 
played.
Skipping tracks forwards / backwards
Press the   button. The next track on the CD will be 
played.
Press the   button. If the track has been playing for 
more than 10 seconds, it will revert to the start of that 
track. If it has been playing for less than ten seconds it 
will revert to the preceding track. To skip several tracks, 
the respective button must be pressed until the desired 
track is reached. If the beginning or end of the CD is 
reached during the search, the first or last track will be 
played.Fast forward / reverse
Press the   button and hold it down for audible fast 
forward.
Press the   button and hold it down for audible 
reverse.
The search will stop when the 
button is released. The 
relative time of the track will 
be displayed during the 
search. The search mode will 
cancel if the beginning or end of the CD is reached.
Scanning
Press the SC key. Each track will be played for 8 seconds 
in ascending order. The search will stop at the track in 
question if the  ,  ,  ,   buttons or the 
“SC” key is pressed. 
     
        
        Page 153 of 354
150 Audio system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Random play / repeat function
The tracks of the current CD are played in random order 
when the random feature (RDM) is selected. Press the 
RDM key to switch on, and press RDM again to switch 
off. 
When the repeat function 
(RPT) has been selected, a 
particular track can be played 
for as many times as desired. 
Press the RPT key to switch 
on, and press RPT again to switch off.
Note:
Both functions cannot be used simultaneously.Direct track selection
Tracks can be selected directly using the buttons on the 
alpha-numeric keypad. Press the “ function button, 
followed by the track number. 
     
        
        Page 154 of 354

151 Audio system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Telephone operation
Various functions of the Mercedes-Benz integrated 
cellular telephone
1 can be performed and displayed via 
the car radio. Further instructions for operating the car 
telephone can be found in the operation guide for the 
cellular telephone1.
Switching the telephone on and off
Switching on: Press the   
button, “TEL” appears in the 
corner of the display.
Switching off: Press and hold 
the   button until the telephone symbol “TEL” no 
longer appears in the display, or press the “PWR” button 
on the phone’s keypad.
1 Optional equipment
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 button. The entered number can be corrected using 
the “CLR” key.
Press the CLR key briefly - 
and the last digit will be 
deleted.
Press the CLR key longer - and 
the complete number will be deleted.
Calling up the phone book
The numbers stored in the telephone memory can be 
called up via either name or number entries. The 
memory contents from the portable phone must be 
downloaded and the telephone menu must be selected 
in order to call up the phone book. Refer to the 
“Memory download” section of the cellular telephone 
operation guide for more information. 
     
        
        Page 155 of 354

152 Audio system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Switching between name search and number search
Press ABC key - Name search
Press NUM key - Number search
Searching and selecting phone book entries by name
Press the ABC key. The current name is shown on the 
display. The stored entries in alphabetical order can be 
selected using the   or   button. By pressing the 
 or   buttons, the stored entries can be selected 
according to alphabetical initial letters (e.g. A-Adam, 
B-Brown, M-Miller).
Searching and selecting phone book entries by 
number
Press the NUM key. The current number is shown on 
the display. The stored entries can be selected in 
numerical order using the   or   button. By 
pressing the   or   buttons, the stored entries 
can be selected in increments of 5 (e.g. Entry no. 2, 
Entry no. 7, etc.).Placing a call
When a number or a name 
has been selected using the 
method described above, 
press the SND key.
Manual repeat dialing (redial)
The last number entered can be re-selected by pressing 
the SND key once and the call can be placed by pressing 
the SND key a second time. The last dialed telephone 
number is shown on the display. Using the  ,  , 
 or   button, the numbers stored in the re-dial 
memory of the telephone can be selected.
The abbreviation L and the 
number in the memory are 
shown in the top line of the 
display. 
     
        
        Page 156 of 354

153 Audio system
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index Accepting incoming call in telephone mode
With an incoming call, the ringing tone will be heard 
and the message “CALL” appears in 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 
(telephone symbol in the display), then a switch is made 
automatically to telephone when an incoming call is 
received. The audio source is muted, the ringing tone is 
heard and the message “CALL” appears. After the call 
has been terminated, the previously selected audio 
source is resumed.Terminating call
A current call can be terminated by pressing the END 
key.
Component malfunctions
The radio, CD changer
1, and Mercedes-Benz integrated 
cellular telephone
1 are part of a fiberoptic networked 
system. Failure of one of the components can lead to 
malfunctions of the other components. Please contact 
your authorized Mercedes-Benz Center or call 
1-800-FOR-MERCedes for more information in the event 
of a malfunction.
1Optional equipment 
     
        
        Page 193 of 354

190 Tele Aid
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
initiated. When a voice connection is established the 
audio system mutes and the message “TELE AID – 
EMERGENCY CALL ACTIVE” appears in the 
multifunction display. The Response Center will attempt 
to determine more precisely the nature of the accident 
provided they can speak to an occupant of the vehicle.
The Tele Aid system is available if:
•it has been activated and is operational. Activation 
requires a subscription for monitoring services and 
cellular air time
•the relevant cellular phone network and GPS signals 
are available and pass the information on to the 
response center.
Note:
Location of the vehicle on a map is possible if the 
vehicle is able to receive signals from the GPS satellite 
network and pass the information on to the response 
center.
Wa r n i n g !
If the indicator lamp in the SOS button is 
illuminated continuously and there was no voice 
connection to the Response Center established, 
then the Tele Aid system could not initiate an 
emergency call (e.g. the relevant cellular phone 
network is not available). The message 
“EMERGENCY CALL – CALL FAILED” appears in 
the multifunction display for approx. 10 seconds.Should this occur, assistance must be summoned 
by other means. 
     
        
        Page 195 of 354

192 Tele Aid
Te ch n i c a l
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Roadside Assistance button •
Located below the center armrest cover is the Roadside 
Assistance button•. Pressing and holding the 
button (for longer than 2 seconds) will initiate a call to a 
Mercedes-Benz Roadside Assistance dispatcher. The 
button will flash while the call is in progress. The 
message “ROADSIDE ASSISTANCE – CONNECTING 
CALL” will appear in the multifunction display. When 
the connection is established, the message “ROADSIDE 
ASSISTANCE – CALL CONNECTED” appears in the 
multifunction display. The Tele Aid system will transmit 
data generating the vehicle identification number, 
model, color and location (subject to availability of 
cellular and GPS signals).
A voice connection between the Roadside Assistance 
dispatcher and the occupants of the vehicle will be 
established. When a voice connection is established the 
audio system mutes and the message “TELE AID – 
ROADSIDE ASSISTANCE CALL ACTIVE” appears in the 
multifunction display. The nature of the need for 
assistance can then be described. The Mercedes-Benz 
Roadside assistance dispatcher will either dispatch a 
qualified Mercedes-Benz technician or arrange to tow 
your vehicle to the nearest Mercedes-Benz Center. For services such as labor and/or towing charges may 
apply. Refer to the Roadside Assistance manual for more 
information.
These programs are only available in the USA:
•Sign and Drive services: Services such as jump start, 
a few gallons of fuel or the replacement of a flat tire 
with the vehicle spare tire are obtainable,
•Remote Vehicle Diagnostics: This function permits 
the Mercedes-Benz Roadside Assistance dispatcher 
to download malfunction codes and actual vehicle 
data.
Notes:
The indicator lamp in the Roadside Assistance 
button• remains illuminated in red for approx. 
10 seconds during the system self-check after turning 
electronic key in steering lock to position 2 (together 
with the SOS button and the Information button¡).
See system self-check on page 189 when the indicator 
lamp does not light up in red or stays on longer than 
approximately 10 seconds.