Page 73 of 225
65 Audio
Sound settings
Setting Bass/Treble/Fader/Balance
1Setting mode active
Turn the right-hand rotary/push-button
v to move the cursor to the parameter
you want to adjust and press to con-
firm.
The setting mode is active. The activa-
ted sound parameter is shown in red.
Turn the right-hand rotary/push-button
v to set the desired value.
Press the button.
The value is set. The sound feature is
shown in black.Reset the Settings to “0”
Turn the right-hand rotary/push-button
v to highlight “Reset” and press to
confirm.
COMAND sets treble and bass to “0”
and sets the sound-center into the
middle of the vehicle.
Return to the main audio menu
Press *.iThe sound-center adjustments affect
the settings for the radio (FM/AM/WB)
and CD operation.
Adjustments which are made to the na-
vigation system will affect the voice re-
cognition system and the telephone.
Page 74 of 225

66 AudioSound settingsActivating sound optimization
Turn the right-hand rotary/push-button
v to highlight “Other Options” in the
main sound settings menu and press to
confirm.
The “Other Options” (FM/AM, WB or
CD) menu will appear.
P - actual sound optimization
Turn the right-hand rotary/push-
buttonv to highlight the desired
sound optimization and press to con-
firm.
The new sound optimization is
active P.Return to the main sound menu
Turn the right-hand rotary/push-button
v to highlight “Bass/Treble” and
press to confirm.
Return to the main audio menu
Press *.
Available sound optimizations
Standard - COMAND set the sound li-
near for the center of the vehicle
Speech - the emphasis is on the spo-
ken word
Driver-optimized - COMAND optimizes
the sound for the driver’s seat position
Ambience
Small, medium and large rooms are si-
mulated
P82.85-9116-31
iYou can only select one sound optimiza-
tion at a time.
P82.85-9117-31
iCOMAND does not offer sound optimi-
zation for the service sources.
Page 75 of 225
67 Telephone
Important notes
Multifunction display
Telephone operation
SMS function
Emergency call
Service numbers
Page 76 of 225

68 TelephoneImportant notes
Important notesIn chapter “Telephone”, you will find de-
tailed information regarding the telepho-
ne*, including emergency call, SMS
function and service numbers.
1 Observe all legal requirements
Please read the chapter “Telephone”
first before attempting to operate your
telephone.
Always drive with extreme caution
when you operate the telephone
hands-free.
For safety reasons, you should not use
the mobile telephone handset to make
a call while driving the vehicle.
If the signal strength is very weak (dis-
play in the symbol field of all menus):
Wait until reception improves before
making a call.
Warning
G
Some jurisdictions prohibit the driver from
using a cellular telephone while driving a ve-
hicle. Whether or not prohibited by law, for
safety reasons, the driver should not use the
cellular telephone while the vehicle is in mo-
tion. Stop the vehicle in a safe location be-
fore answering or placing a call.
If you nonetheless choose to use the cellular
phone while driving, please be sure to pay
attention to the traffic situation at all times.
Use the cellular phone
1 only when the traffic
situation allows.
Never operate radio transmitters equipped
with a built-in or attached antenna (i.e.
without beeing connected to an external an-
tenna) from inside the vehicle while the en-
gine is running. Doing so could lead to
malfunction of the vehicle’s electronic sys-
tems, possibly resulting in an accident and
personal injury.
!Radio transmitters, such as a portable
telephone or a citizens band unit
should only be used inside the vehicle
if they are connected to a separate ex-
terior antenna that has been approved
by Mercedes-Benz.
Page 77 of 225

69 Telephone
Important notes
Close the windows and reduce all out-
side noise as much as possible when
you use hands-free operation.
A brief disconnection from the cellular
network is not a malfunction, as this
can occur when the network switches
areas. The phone will automatically try
to sign on to a network again.
If the message “Locked. Please enter
code” appears, enter the unlock code
to enable all telephone functions
(page 78).
If a menu other than the telephone
menu is displayed on the COMAND
screen, the display will change if an
outgoing call is sent out via the multi-
function steering wheel.In the following situations, it is not possible
or not yet possible to use the telephone:
The telephone is already unlocked but
is not or not yet registered in the net-
work.
The message “No Service” appears.
The telephone will try to register into
an existing network. If the network is
available, the telephone will be ready
for use.
The above message also appears
if the network is no longer available
due to weak signals
if you try to make a call (message
appears for 8 seconds)
The message “Telephone is being acti-
vated. Please wait.” appears.
COMAND prepares the telephone for
use. Select other system functions, e.g.
radio, by pressing the corresponding
button or wait until the telephone is ac-
tive.
One of the two messages “No telepho-
ne” or “Telephone not connected” ap-
pears.
Please connect the telephone.
The message “Telephone defective”
appears.
Please contact an authorized
Mercedes-Benz Center.
Page 78 of 225
70 TelephoneImportant notesIn the following situation, it is not yet pos-
sible to use the functions “Dial number
from phone book”, “Redial” and
“Speed-dial”:
The mobile telephone has been
plugged into its holder correctly, the
COMAND operating unit has been swit-
ched on and the phone book download
function has been actuated (see tele-
phone operation guide).
Once the download process has been
completed, the above functions be-
come available. It is not possible to make a call when one
of the following messages appears:
“System busy, redial?”
Dialing has failed because system is
busy.
“No service, redial?”
Dialing has failed because network
cannot received.
“Phone off”
Tele Aid is active, the telephone func-
tion will switch on automatically after
Tele Aid is ended.
Page 79 of 225
71 Telephone
Multifunction display
Multifunction display
Turn the electronic key in the steering
lock to position “1” or “2”, refer to ve-
hicle operating instructions.
1
2
5
3
4
P82.85-9290-31
Function
Page
1
Multifunction display on
the speedometerUsing the control system
2
Adjusting the dial/idle
tone volume during a call
I lowering
J raising
3
To make a call
K Accept an incoming
call
Start dialing opera-
tion
Activate the redial
memory
79
85
91
L End a call
Interrupt dialing
The message
READY
appears
79
83
4
Changing from system to
system, displaying network
provider
E next
H previous
5
Pages through the phone
book in alphabetical order
F forward
G backwardFunction
Page
Page 80 of 225
72 TelephoneMultifunction displayDisplay overview