Page 151 of 474

150 Controls in detail
Control system
You can use the functions in the TEL menu 
to operate your telephone, provided it is 
connected to a hands-free system and 
switched on.
Switch on the telephone and Audio or 
COMAND*.
See separate operating instructions.
Press buttonèorÿ repeatedly 
until the 
TEL menu appears in the 
multifunction display.Which messages will appear in the multi-
function display depends on whether your 
telephone is switched on or off:
If the telephone is switched off, the 
message in the multifunction display is: 
PHONE OFF.
If the telephone is switched on:
The telephone will then search for a 
network. During this time the multi-
function display is empty.
As soon as the telephone has found a 
network, 
Ready is indicated in the mul-
tifunction display.
This standby message indicates that your 
telephone is ready for use and you can op-
erate it using the control system.Answering a call
When your telephone is ready to receive 
calls, you can answer a call at any time. In 
the multifunction display you will see the 
message, or if available, the caller ID 
(name and number):Audio system
COMAND*
Press buttons.
You have answered the call.
The duration of the call appears in the 
multifunction display.
Never operate radio transmitters equipped 
with a built-in or attached antenna (i.e. with-
out being connected to an external antenna) 
from inside the vehicle while the engine is 
running. Doing so could lead to a malfunc-
tion of the vehicle’s electronic system, pos-
sibly resulting in an accident and/or 
personal injury. 
     
        
        Page 152 of 474

151 Controls in detail
Control system
Ending a call or rejecting an incoming 
call
Press buttont.
Dialing a number from the phone book
If your telephone is ready to receive calls, 
you may select and dial a number from the 
phone book at any time.
Press buttonèorÿ repeatedly 
until the 
TEL menu and the standby 
message appear in the multifunction 
display.
Press buttonjork.
The control system reads the phone 
book which is stored in the telephone. 
This may take up to 30 seconds. In the 
multifunction display you will see the 
message 
Please Wait.
When the message 
Please wait 
disappears, the phone book has been 
loaded.
Press buttonjork repeatedly 
until the desired name appears in the 
multifunction display.
The stored names are displayed in 
ascending or descending alphabetical 
order.
1Selected name from phone bookPress buttons.
The control system dials the selected 
phone number.
If the connection is successful, the 
name of the party you called and 
the duration of the call will appear 
in the display.
If no connection is made, the con-
trol system stores the dialed num-
ber in the redial memory.
or
Cancel the call you have intended to 
make by pressing buttont.
iIf you press and hold buttonj ork 
for longer than 1 second, the system scrolls 
rapidly through the list of names until you 
release the button again.
Cancel the quick search mode by pressing 
buttont. 
     
        
        Page 153 of 474
152 Controls in detail
Control system
Redialing
The control system stores the most recent-
ly dialed phone numbers. This eliminates 
the need to search through your entire 
phone book.
Press buttonèorÿ repeatedly 
until the 
TEL menu and the standby 
message appear in the multifunction 
display.
Press buttons.
In the multifunction display you will see 
the first number in the redial memory.
Press buttonjork repeatedly 
until the desired number or name 
appears in the multifunction display.
Press buttons.
The control system dials the selected 
phone number.
If the connection is successful, the 
duration of the call will appear in the 
multifunction display, and
the name of the party if stored in 
the phone book
or
instead of it the dialed number
or
Cancel the call you have intended to 
make by pressing buttont. 
     
        
        Page 197 of 474

196 Controls in detail
Audio system
Button and soft key operation
In these instructions, the alphanumeric 
keypad (right side of radio panel) and the 
function buttons (left side of radio panel) 
are referred to as “buttons”. The four keys 
below the display panel are referred to as 
“soft keys”.Operation
Switching the unit on/off
Switching on
Turn the SmartKey in the starter switch 
to position1 or2 (
page 37). 
If the audio system was on as you 
removed the SmartKey from the starter 
switch, the audio system will 
automatically come back on as you 
turn the SmartKey to position1 or2.
or
PressDbutton.Switching off
Remove the SmartKey from the starter 
switch.
or
PressDbutton.
Adjusting the volume
Turn rotary control ofEbutton.
The volume will increase or decrease 
depending on the direction turned.
!Do not press directly in the display face. 
Otherwise, the display will be damaged.
iIf the radio is switched on without the 
SmartKey in the starter switch, it will automati-
cally switch off again after approximately 
30 minutes.
If your vehicle is equipped with a mobile 
telephone*, the display may prompt you to enter 
your PIN (GSM network) or code (TDMA or 
CDMA network).
iShould excessively high temperatures occur 
while the audio system is being operated, the 
display will dim. If temperatures continue to rise, 
HIGH TEMP will appear in the display, after which 
the audio system will be switched off for a 
cooling-down period.
iIf your vehicle equipment includes a 
Mercedes-Benz specified mobile telephone*, 
you can adjust its volume separately from the 
volume of the audio system while the telephone 
is being used. 
     
        
        Page 201 of 474
200 Controls in detail
Audio system
Calling up wavebands for radios 
with SAT
Press FM, AM or WB soft key repeatedly 
until desired waveband has been 
selected.
The FM, AM and WB wavebands are 
called up one after another.
The waveband currently selected 
appears in the upper left-hand corner 
of the display.Selecting a station
The following options are available for 
selecting a station:
Direct frequency input (page 200)
Manual tuning (page 201)
Automatic seek tuning (page 201)
Scan search (page 201)
Station memory (page 201)
Automatic station memory (Autostore) 
(
page 202)
The station search proceeds in the 
following frequency increments:
0.2 MHz in FM range
10 kHz in AM rangeDirect frequency input
Select desired waveband.
Press * button.
Enter desired frequency with 
buttons1to R.
iYou can only enter frequencies within the 
respective waveband.
If a button is not pressed within 4 seconds, the 
radio will return to the last station tuned. 
     
        
        Page 203 of 474

202 Controls in detail
Audio system
Autostore – automatic station memory
The Autostore memory function provides 
an additional memory level. The station 
memory for manually stored stations is not 
overwritten.
Calling up Autostore memory level and 
storing stations
Press AS soft key briefly.
The radio switches to the Autostore 
memory level. 
AS and SEARCH 
appear in the display and the radio 
finds the ten stations with the 
strongest signals. These stations 
are stored on the station 
buttons1 to R in order of 
signal strength.
Calling up stations
Press desired station button1 
to R.
Leaving the Autostore memory level
Press FM or AMsoft key briefly.
Interrupting radio mode
The radio mode is interrupted by an 
incoming call on the telephone* 
(
page 224).
Mute on
PressFbutton.
The radio mode is interrupted and 
MUTED appears in the display.
Mute off
PressFbutton.
The radio mode is again active.Weather band
Press WB soft key.
The weather band station last received 
is tuned in.
Selecting a weather band station 
directly
Select desired weather band station 
with buttons 1 to 7.
If a station cannot be tuned in, a search 
is automatically started. 
     
        
        Page 213 of 474

212 Controls in detail
Audio system
Operating the single CD player in the 
audio system unit
Loading a CD
The single CD player in the audio system 
unit has capacity for one CD. The CD slot 
for loading the drive is located underneath 
the soft keys.
Make sure the system is switched on.
Insert CD into CD slot. The label side of 
the CD must face upwards.
The system automatically pulls the CD 
into the CD slot. The audio CD begins 
to play.Ejecting a CD
Make sure the system is switched on.
Press gbutton.
The system ejects the CD. 
Remove CD0 
will appear in the display.
Remove CD from slot.
With the CD removed, 
NO CD will appear 
in the display.Operational readiness of CD changer*
If a CD changer has been installed in the 
vehicle, it can be operated from the front 
control panel of the audio system.
The CD changer is located in the glove box.
1CD loading slot
2Magazine slot button
A magazine is integrated into the CD 
changer as a fixed element. It holds a 
maximum of six CDs.
The CD changer features six magazine slot 
buttons2 for controlling the loading 
procedure.
!If a CD is already loaded, it must be ejected 
before inserting a new CD. Inserting a second 
CD in the slot with another CD still loaded will 
cause damage to the CD drive not covered by the 
Mercedes-Benz Limited Warranty. 
iIf a CD has been inserted incorrectly or 
cannot be read, 
WRONG CD0 will appear in the 
display.
iIf you do not take the CD out of the CD slot 
within approximately 15 seconds, the system 
automatically pulls the CD back in and plays it.
If a CD is pulled back in, press gbutton, the 
CD will then be ejected. 
     
        
        Page 214 of 474

213 Controls in detail
Audio system
A light-emitting diode in the buttons shows 
the status of the corresponding magazine 
slot.
CD loading slot1 is above buttons2 
and is used to load CDs.Loading the CD magazine
Loading single CDs
Open the glove box (page 253).
1CD loading slot
2Magazine slot button
Briefly press button2 for the empty 
magazine slot that you would like to 
use.
The light-emitting diode in the maga-
zine slot button flashes in green. 
INSERT CD appears in the display along 
with the slot number.
The flashing light indicates that the CD 
changer is ready to receive a CD.
Insert an audio CD into CD loading 
slot1 within 5 seconds, label side up.
The CD is pulled in and played.
Close the glove box.
LEDs
no LED is litMagazine slot is 
empty.
green LED flashesCD can be loaded.
red LED is litMagazine slot is in 
use.
red LED flashesCD is being ejected.
iIf a CD has been inserted incorrectly or 
cannot be read, 
WRONG CD0 will appear in the 
display.
Loading one or more CDs interrupts the 
CD playback.