Page 206 of 509

205 Controls in detail
Audio system
Channel number is valid, but channel is 
not included in subscription: The mes-
sage 
Please call SIRIUS to subscribe 
pops up (
page 202).
Press n to close the message in the 
audio display.
Tuning in channels using the satellite ra-
dio channel list
b  Sat  Channel List.
The channel list appears. The dotR in 
front of a list entry indicates the cur-
rently selected channel.
Select channel by rotating ymz or 
slidingqmr.
Press n to confirm.Tuning in channels using satellite radio 
channel presets
b  Presets.
or
Press n when the main area is select-
ed.
The preset menu appears. The dotR 
in front of a preset position indicates 
that this is the channel currently select-
ed and being listened to.
Select station in memory by rotating 
ymz or sliding qmr.
Press n to confirm.
or
Press desired station button1 to 
R, with the keypad in audio control 
unit briefly.
The audio system tunes in the correspond-
ing channel as long as it is included in your 
subscription and is still available.
If the channel is not included in your sub-
scription, you will see the message de-
scribed in the section “Satellite radio 
service is not activated” (
page 202).
If the channel is no longer available, you 
will see the message 
Invalid Channel.
Closing message: Press n.iThe contents of the channel list depends on 
which channels are included in your subscription 
and which program category you have selected 
(
page 203). If only the preview channel is acti-
vated, the channel list contains only the preview 
channel. 
         
        
        
     
        
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206 Controls in detail
Audio system
Storing channels
Press n when the main area is select-
ed.
or
b  Presets.
In both cases, the preset menu will appear 
in the audio display. The dot R in front of 
a preset position indicates that the chan-
nel currently selected is stored there.
Selecting a preset position: 
Slideqmr or rotate ymz.
Storing a preset position: Press and 
hold n until you hear a signal.
The channel is stored.
or
Press and hold desired channel 
button1 to R on keypad, until a 
brief signal tone sounds.
The channel is stored.
Show program info
b  Info.
You will see a screen that may contain the 
following information (if available):
Selected program category
Selected channel
Artist of the track currently being 
played
Name of current trackWith the telephone keypad button ô 
you can call up an popup screen, if provid-
ed by the program provider, that shows the 
name of the actor and title of the current 
track played on the selected channel.
Closing screen: Slide omp or 
pressn.
iThere are ten preset positions available.
iIf the program provider does not offer any in-
formation, the “Info” menu item cannot be se-
lected.
iThe program provider determines what in-
formation is displayed on the screen. The audio 
system shows no more than two lines per item of 
information. If an item of information is too long, 
the audio system shortens it. 
         
        
        
     
        
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215 Controls in detail
Audio system
Loading an individual magazine 
compartment: Press eject/load 
button2.
A menu indicates which magazine com-
partments are currently loaded. The 
first available magazine compartment 
is indicated by a red number.
Press desired button1 to 6, in 
the keypad to select a magazine com-
partment.
or
Slide omp or rotate ymz to select a 
magazine compartment.
Press n to confirm.
The CD changer will switch to the se-
lected magazine compartment. The 
message 
Please Wait... appears in 
the display.
Insert CD into CD slot1.
The CD changer automatically pulls the 
CD into the CD slot1 and places it in 
the selected magazine compartment. 
The message 
Loading Disc  
appears in the display.
Press buttoné, or the eject/load 
button2 on the audio control unit to 
finish the loading process.
The CD changer plays the disc if it has 
been inserted correctly and is permissi-
ble.
To interrupt loading procedure: 
Press the eject/load button again.
or
Press buttoní in the center con-
sole (
page 184).
iIf the audio CD is printed on one side, this 
side must face upwards when loaded. If neither 
side is printed, the side to be played must face 
downwards.
If a CD has been inserted incorrectly or cannot 
be read, 
Disc Unreadable appears in the 
display.
iOnly insert a CD after the audio system has 
prompted you to do so with the message 
Please 
Insert Disc 
. Only insert one CD per mag-
azine compartment.
iThe loading process may take a while, de-
pending on the type of disc. If you do not insert a 
disc, the display will switch back to the 
Maga-
zine
 menu after approximately 20 seconds. 
         
        
        
     
        
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217 Controls in detail
Audio system
Ejecting one CD: Press eject/load 
button2.
The magazine menu with active main 
area appears in the audio display. The 
magazine compartment with the cur-
rent CD is highlighted.
Press desired button1 to 6, in 
the keypad to select a magazine com-
partment.
or
Slideompor rotate ymz the audio 
controller to select the desired CD.
Press n to confirm.
Remove the CD from CD slot1.
If you do not remove the CD from the 
CD slot 1, the CD changer will auto-
matically pull the CD back in after a 
short while.
Ejecting all CDs: Press eject/load 
button2.
The magazine menu with active main 
area appears in the audio display. The 
magazine compartment with the cur-
rent CD is highlighted.
Slidemr to select the menu bar.
Slideompor rotate ymz the audio 
controller to select “Eject All”.
Press n to confirm.
The CDs are ejected one after the 
other.
Remove the CD from CD slot1.
The CD changer switches to the next 
occupied magazine compartment and 
ejects the CD.
If you do not remove the CD from the 
CD slot 1, the CD changer will auto-
matically pull the CD back in after a 
short while.
Repeat the last step until the magazine 
is empty.
Selecting a CD
é  Changer.
The magazine menu with active main 
area appears in the audio display. The 
magazine compartment with the cur-
rent CD is highlighted.
Slideompor rotate ymz the audio 
controller to select the desired CD.
Press n to confirm.
iIf you eject a CD while another is being 
played, the audio system interrupts playback. 
Playback will continue once the CD has been 
ejected completely. 
         
        
        
     
        
        Page 219 of 509
218 Controls in detail
Audio system
Playing CDs
Additional button functions
In CD mode, you can use two additional 
buttons on the telephone keypad:
ôdisplays information about the 
track, if this has been saved 
with the track on the CD.
óenables you to enter the track 
number directly.Example display in audio CD mode
1Track number
2Track name (only if saved on the disc)
3Elapsed track time
4Disc name (only if saved on the disc)
5Disc number (CD changer*)
6Disc typeExample display in MP3 mode
1Track number
2File name
3Elapsed track time
4Mode
5Folder name (only if saved on the disc)
6Disc number (CD changer*)
7Disc type
Pause function
Pausing playback:
Press F briefly.
Continuing playback: PressF 
again briefly.
iThe following section is valid for the single 
CD player and the CD changer*. The illustrations 
show the audio display of the CD changer*. 
         
        
        
     
        
        Page 223 of 509

222 Controls in detail
Audio system
Telephone*
Safety precautionsWhen the telephone is connected via the 
Bluetooth® interface to the audio system, 
you can operate the telephone using the 
following devices:
audio system (page 237)
Audio controller
Audio control unit
buttonss andt on the multi-
function steering wheel (
page 152)
mobile phone keypad
Please note that these functions are only 
available with Mercedes-Benz approved 
telephones.
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 tele-
phone
1 while driving, please use the hands-
free device and be sure to pay attention to 
the traffic situation at all times. Use the tele-
phone only when road, weather and traffic 
conditions permit. Otherwise, you may not 
be able to observe traffic conditions and 
could endanger yourself and others.
1Observe all legal requirements.
Bear in mind that at a speed of just 30 mph 
(approximately 50 km/h), your vehicle is 
covering a distance of 44 feet (approxi-
mately 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, pos-
sibly resulting in an accident and/or 
personal injury.
iThe functions and services available to you 
while using the telephone depend on your ser-
vice provider and the type of telephone you are 
using. See also separate operating manual for in-
structions on how to use your telephone. 
         
        
        
     
        
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224 Controls in detail
Audio system
Operating options
When the telephone is connected via the 
Bluetooth
® interface to the audio system, 
you can operate the telephone using the 
following devices:
buttonss andt and keypad on 
audio control unit
audio controller in center console
multifunction steering wheel
Please note that these functions are only 
available with Mercedes-Benz approved 
telephones. Please contact an authorized 
Mercedes-Benz Center for information on 
features available for your telephone of 
choice. Unless otherwise indicated, the descrip-
tions and illustrations in this section refer 
to audio system.Caller ID
The audio system can display the tele-
phone number and the name of the caller, 
e.g. for an incoming call and also in other 
menus or displays.
For the telephone number to be displayed, 
the caller must transmit their telephone 
number.
This is also the case for name displays. For 
this, the telephone number and the name 
of the caller must also be saved in the tele-
phone book.
iThe components and operating principles of 
the audio system can be found on (
page 177) 
and (
page 187).
iIn order for the functions described in this 
section to work correctly, the Bluetooth® tele-
phone must be linked to the audio system 
(
page 192). Please make sure any other Blue-
tooth® device linked with the telephone is 
switched off before you use the telephone func-
tions with the audio system. 
         
        
        
     
        
        Page 228 of 509

227 Controls in detail
Audio system
Authorizing a Bluetooth® device
Select the desired unauthorized device 
from the telephone list by pushing the 
audio controller.
or
Select Options  Authorize.
The input menu for the passcode 
appears.On the audio system, you can enter the 
passcode via the digits in the on-screen 
menu bar or via the telephone keypad in 
the audio control unit.With the audio controller:
Entering passcode: Select the digits 
in the menu bar one by one, by 
slidingompor rotating ymz the audio 
controller.
Press n to confirm each digit.
Confirming passcode: Selectdin 
the menu bar and press n to confirm.
Deleting digits: Select õ in the 
menu bar and briefly press n to delete 
one digit, or press and hold n to delete 
all entered digits.
Canceling entry: Press buttoní in 
the center console (
page 184).
iThe passcode is any one- to sixteen-digit 
number, which you can set yourself. For the 
quality of coding of the connection it is recom-
mend to use a passcode of at least four digits. 
You must enter the same number in the audio 
system and also in the device to be authorized. 
Please also refer to the instructions in the tele-
phone operating guide.