Page 161 of 509

160 Controls in detail
Control system
Operating the CD player*
Turn on the radio and select the CD 
mode (
page 213). 
Vehicles with COMAND*:
Refer to separate operating 
instructions.
Press ( or & to select the Audio 
menu. The settings for the currently be-
ing played CD appear in the 
multifunction display.
1Current CD (with additional number 
from 1 to 6 when running from 
CD changer*)
2Current track
Press % or $ to select a track.For more information on CD operation, see 
“CD mode” (
page 208) and for the 
CD changer*, see (
page 214).
1Current track
For more information on MP3, see “Notes 
about MP3 mode” (
page 210).
TEL menu*
You can use the functions in the 
Tel menu 
to operate your Bluetooth® enabled tele-
phone, if it is switched on and connected 
via the Bluetooth
® interface to the audio 
system.
Vehicles with COMAND*: Refer to sepa-
rate operating instructions.
iTo select a CD from the CD changer* maga-
zine, press a number on the audio system or the 
COMAND* system key pad located in the center 
console.
iLevel of information displayed will vary de-
pending on the information contained on the CD 
with MP3 files insert in the audio or COMAND* 
system.
Warning!G
Some jurisdictions prohibit the driver from 
using a cellular telephone while driving. 
Whether or not prohibited by law, for safety 
reasons, the driver should not use the cellu-
lar telephone while the vehicle is in motion. 
Stop the vehicle in a safe location before 
placing or answering a call.
If you nonetheless choose to use the mobile 
phone while driving, please use the hands-
free device and be sure to pay attention to 
the traffic situation at all times. Use the mo-
bile phone only when road, weather and traf-
fic conditions permit. 
     
        
        Page 162 of 509

161 Controls in detail
Control system
Switch on the telephone and audio sys-
tem.
Activate and register the telephone 
(
page 225).
Press ( or & to select the Tel 
menu.
Which messages will appear in the 
multifunction display depends on whether 
your telephone is switched on or off:
If the Bluetooth® function on the audio 
system is disabled, the message 
Blue-
tooth not activated in system set-
tings
 appears. To enable Bluetooth® 
(
page 193).
If the telephone is switched on, the 
telephone will then search for a net-
work. During this time, the message 
No 
Service
 appears in the multifunction 
display. If no network available, the 
multifunction display message 
No Ser-
vice
 is shown continuously.
If the telephone is on, as soon as the 
telephone has found a network, 
Phone 
Ready
 appears in the multifunction dis-
play.This standby message indicates that your 
telephone is ready for use and you can 
operate it using the control system.
You may carry out the following functions:
Otherwise, you may not be able to observe 
traffic conditions and could endanger your-
self and others.
Bear in mind that at a speed of just 30 mph 
(approximately 50 km/h), your vehicle is 
covering a distance of 44 feet 
(approximately 14 m) every second.
Warning!G
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, 
possibly resulting in an accident and 
personal injury.FunctionPage
Dialing a number from the phone 
book162
Redialing163
Answering a call163
Ending a call or rejecting an in-
coming call163 
     
        
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177 Controls in detail
Audio system
Operating safetyAudio system components
With the audio system you can operate the 
following main functions:
audio function with the radio, Sat*, 
disc (CD audio or MP3 mode)
the telephone* with the phone book
various system settings
The audio system consists of the following:
audio control unit
audio display
audio controller with back and delete 
button
In addition, the audio system can also be 
operated with the multifunction steering 
wheel (
page 152).
In these instructions, the keypad (right 
side of audio control unit) and the function 
buttons are referred to as “buttons”.Audio control unit
With the audio control unit you can:
switch the audio system on/off
adjust the volume
select the operating modes
enter telephone numbers and accept, 
reject, initiate and end telephone calls
load and eject CDs
Warning!G
Any alterations made to electronic 
components can cause malfunctions.
The radio, amplifier, CD changer*, satellite 
radio*, and telephone* are interconnected. 
When one of the components is not opera-
tional or has not been removed/replaced 
properly, the function of other components 
may be impaired.
This condition might seriously impair the 
operating safety of your vehicle.
We recommend that you have any service 
work on electronic components carried out 
at an authorized Mercedes-Benz Center. 
     
        
        Page 180 of 509

179 Controls in detail
Audio system
ItemPage
1Switching to radio mode196
Switching wavebands196
Switching to Sat* mode
2Switching to CD audio or 
MP3 mode213
3Disc slot
Loading CDs
Ejecting CDs
Updating the map software
4Load/eject button214
5Clear button for deleting 
digit or entire entries184
237
Entering a passcode228
Entering a telephone 
number237
ItemPage
6Keypad
Tuning to a station via the 
station memory197
Storing stations manually198
Entering a passcode228
Entering a telephone 
number237
Sending DTMF tones240
CD changer*: Selecting CD217
7Tuning to a station via 
station search197
Fast forward219
Selecting next track219
8Switching audio on/off188
9Setting the volume189
aTuning to a station via sta-
tion search197
Fast reverse219
Selecting previous track219
ItemPage
bConfirming a passcode228
Accepting a call239
Initiating a call237
Redial238
cRejecting a call239
Ending an active call238
dOpening system menu192
eSwitching sound on/off189
Switching hands-free 
microphone on/off240
fSwitching to telephone 
mode225
gSound settings189 
     
        
        Page 181 of 509

180 Controls in detail
Audio system
Audio display
The audio display has a protective cover.Audio display cover
1Opening buttonOpening: Press opening button1.
The audio display cover opens, the au-
dio display is visible, and the audio sys-
tem switched on.
Closing: Press the audio display cover 
down until it engages.
If the audio system is still switched on, 
you can continue to listen to the radio 
or a CD and operate the device via the 
buttons on the audio control panel.
!Do not place any objects on the cover of the 
audio display. This may obstruct the movement 
when the cover is being opened/closed. The 
cover could be damaged. Do not place any ob-
jects in front of the audio display and/or secure 
any objects to the audio display itself. The audio 
display could be damaged.
Avoid touching the audio display at all times. The 
display has a very sensitive high-gloss surface, 
there is a risk of it being scratched. Do not press 
directly in the display face. Otherwise, the audio 
display will be damaged.
iFor information about cleaning and care of 
the audio display, see “Audio display” 
(
page 371).
iYou cannot operate the audio system via the 
audio controller when the protective cover is 
closed. 
     
        
        Page 182 of 509

181 Controls in detail
Audio system
Display
The currently selected mode and the asso-
ciated menus are shown on the audio dis-
play. The audio display is divided into 
several areas.
For example, radio selected
1Menu bar
2Main area
3Status lineThe status line3 displays the time and 
the current settings for radio and 
telephone mode.
You can request the required function 
using the menu bar1. 
The selection is made using the audio con-
troller.Mobile phone readiness is indicated by 
additional information being shown in the 
status line:
In the main menu TEL: Name of the 
Bluetooth® device (calls made and re-
ceived via the Bluetooth® interface).
Mobile phone network signal 
strengthI. This information will 
only be shown with suitable tele-
phones.
Receiver symbol 4 ö
In this example, the audio main function is 
set to the radio mode and the main 
area2 is active.
iThe layout of the menus may vary depending 
on your vehicle’s equipment. This manual shows 
the menus for a fully equipped vehicle. 
     
        
        Page 186 of 509
185 Controls in detail
Audio system
Menu
The illustration below shows the structure 
of the modes and their menus.Each mode has a basic menu. In the menu 
line of the basic menu display are several 
menu items listed.Each menu item in turn has several sub-
menu items.
ButtonMode/Basic menuMenuPage
bRadioRadio (FM/AM)194
Weather Band194
Sat Radio*200
Presets198
Sound189
éDiscCD/MP3208
Track list/folder list219
CD changer*214
Sound189
hTelephone*Telephone*222
Name233
Call lists236
êSystemSystem192
Language193 
     
        
        Page 187 of 509

186 Controls in detail
Audio system
Calling up an operating mode
Press the respective button 
(b,é,h,orê) on the 
audio control unit.
The basic menu of the selected mode 
appears in the audio display. The main 
area is active.
The active area is highlighted.
Illustration: radio function basic menu
Moving to the menu bar: Slidemr.Horizontal menus
Moving through the menu bar: 
Slideomp or rotate ymz.
A white bar under the menu indicates 
the selected menu.
Confirm the selected menu item: 
Press n.
Exiting the menu bar without con-
firming a selection: Slide qmin the 
opposite direction of the list orienta-
tion.
or
Press buttoní.Vertical submenus
Moving through the menu: 
Slideqmr or rotate ymz.
A white bar under the submenu indi-
cates the selected submenu.
Confirm the selected submenu 
item: Press n.
Exiting a menu without confirming a 
selection: Slide ompin the opposite 
direction of the list orientation.
or
Press buttoní.
iThe following screens show the audio dis-
play's day design. The appearance of the high-
lighted items in the menu will vary depending on 
the display design.