32 At a glance
Quick reference COMAND
Pressæ or ç on the multifunc-
tion steering wheel
The volume changes up or down, de-
pending on the direction of rotation or
which button was pressed.
The system stores the volume settings
when the device is switched OFF.
After switching the system back on again,
the volume may be lower than at the time
when the system was switched OFF.
This could be the case if
the system was switched OFF for more
than 15 minutes, and
the volume had been set to a value in a
certain range at the time the device
was switched OFF.Automatic volume control
The automatic volume control adjusts the
volume depending on
the vehicle’s speed (only in vehicles
without sound-system*),
or on
the interior ambient noises of the vehi-
cle (only in vehicles with sound-sys-
tem*)
other parameters (e.g. windows open
or closed)
A common balance setting applies to the
following operating modes:
Radio
Single CD
MP3
CD changer*
AUX
Satellite radio*
When adjusting the balance, the system
automatically stores the setting for the
currently active operating mode.
Setting balance
Open the main menu of the appropriate
operating mode (
page 29).
Press the Balance soft key.
The Balance menu appears.
Balance
i
For Navigation* a different balance set-
ting is possible. You find the descrip-
tion under “Adjusting the acoustics for
navigation announcements”
(
page 113).
87 Telephone*
Important notes
Please read chapter “Telephone*” be-
fore attempting to operate your tele-
phone.
Always drive with extreme caution
when operating the telephone hands-
free.
For safety reasons, the mobile tele-
phone handset should not be used to
place or receive a call while driving.
If the signal is very weak (display in the
status bar):
Wait until reception improves before
placing a call.
Close the windows and reduce all ex-
ternal noise as much as possible when
using hands-free operation.
Make sure that the air vents are not
pointed in the direction of the micro-
phones located in the overhead control
panel near the rear view mirror. Adjust
air vents and/or reduce blower speed
if necessary.
A brief disconnection from the cellular
network is not a malfunction, as this
can occur when the network switches
areas. The phone automatically at-
tempts to again sign on with a network.
If the message Enter unlock code is dis-
played, enter the unlock code
(
page 91). Only then will you be able
to use all the telephone functions.
You will still be able to make 911 emer-
gency calls (
page 89) if the tele-
phone is locked.
i
This Operator's Manual describes op-
eration of the telephone using the
COMAND control unit and the multi-
function steering wheel. Unless other-
wise specified, the descriptions and
the illustrated displays refer to the
COMAND control unit.
Operation of the cellular phone is ex-
plained in a separate operation guide.
!
Radio transmitters, such as a portable
telephone or a citizens band unit,
s h o u l d o n l y b e u s e d i n s i d e t h e v e h i c l e i f
they are connected to a separate exte-
rior antenna approved by Mercedes-
Benz.
