2007 MERCEDES-BENZ C230 Audio System

212 Controls in detail
Audio system

Speed dial
If you have stored telephone numbers
as speed dial numbers in your
telephone, you can also enter these
with buttons 1 to R on the radio
head unit.
Press desired button 1 to R
briefly.
Press s button.
The call will be made.

Turbo dial
If you have stored telephone numbers
as turbo dial numbers in your
telephone, you can also enter these
with buttons 1 to R on the radio
head unit.
Press desired button 1 to R
until the call is made.Redial
If the number you have dialed is busy, you
can again place calls to the last ten
telephone numbers dialed using the redial
function.

Manual redial
Press s button.
The telephone number last dialed
will appear in the display.
Select desired telephone number
with button ‚ or ƒ.The letter
L and the number of the
memory position appears in the
left-hand corner of the display. The
numbers are stored in the order of
the calls received.
When you have selected a number,
press s button.
The call will be made.
Accepting an incoming call
If the telephone is active in the background
(reception symbol is visible in the display),
the audio source is muted when an incom-
ing call is received. A ringing tone can be
heard and the caller’s telephone number,
or the name under which the telephone
number has been saved in the phone book,
appears in the display. If the caller’s
number is not transmitted with the call,
CALL will appear in the display.
Press s button.
The call is accepted.
iIf you have activated the automatic redial
function on your telephone, the number of the
person being called is automatically redialed af-
ter a short waiting period if there is a busy signal.
Refer to the separate operating instructions for
the mobile telephone.

213 Controls in detail
Audio system
Muting a call
It is possible to mute a call; the caller is
then no longer able to hear you.

Mute on
PressMUT soft key.
MIC MUTE will appear in the display.

Mute off
PressMUT soft key again.
Terminating a call
Press t button.
The current call is terminated and the
muted audio source becomes active
again.Talking with two callers at the same
time
If you wish to receive or place another call
during an already active call, you can
accept or place the second call and switch
between the callers or combine them into
one call. Note that the features described
here are depending on availability from
your mobile phone service provider.

Placing/accepting a second call
Place new call by entering
telephone number manually.
Press s button.
You are connected to the second
caller; the first caller is kept on
hold.
or
Press s button to accept a
second call.You are connected with the second
caller; the first caller is kept on hold.

Switching between calls
Press 2 and s buttons.
This switches between the calls.
The non-active call is kept on hold.

Terminating a call
Press t button.
The current call is terminated. You
are again connected with the caller
previously placed on hold.

Combining two calls
Press 3 and s buttons.
The calls are combined into one
call.

Terminating a combined call
Press t button.
The connection to both callers is
terminated.
iYou will be notified of the second call acous-
tically, but you will not see this in the display.

214 Controls in detail
Audio system
TDMA or CDMA network phones
Using your Mercedes-Benz specified
mobile telephone*, a number of functions
and operating steps can be performed and
displayed in the audio system display.
Further operating instructions not covered
here can be found in the operating instruc-
tions for the multifunction steering wheel
and the mobile telephone*.
If your audio system is set up for telephone
operation, the t symbol will appear in
the display.
When you insert your Mercedes-Benz
specified mobile telephone* into the
telephone cradle, you will be prompted to
enter your PIN for 30 seconds
(
page 209). This display disappears
when you press any button.
When your mobile telephone is inserted
into the telephone cradle, you will see the
reception strength in the upper right-hand
corner of the display.Switching on the telephone
Switching on the telephone
Press h button.
If you have programmed an unlock
code for the telephone, you must now
enter the code.
Enter code using buttons 1
toR.
If necessary, correct number entered
with the
CLR soft key. Press soft key
briefly to delete the last digit entered;
press soft key and hold to delete the
complete number.
Press OK soft key after entering correct
code.
The telephone is unlocked. If you have
entered an incorrect code, you must
enter the correct code.
Switching off the telephone
Press h button for approx.
3 seconds.
PROCESSING appears in the display until
the telephone is off. Afterward,
PHONE OFF appears in the display.
Adjusting the volume
Turn rotary control of N button
during a telephone call.
The volume will increase or decrease
depending on the direction turned.
iThe volume can be adjusted separately for
telephone mode and audio mode.

215 Controls in detail
Audio system
Adjusting sound
Adjust sound during a telephone call.
Sound adjustment (
page 191).
Placing a call
Entering a telephone number and
starting the dialing process
Enter desired telephone number using
buttons 1 to R.
The number can have up to 32 digits,
but only twelve of these are visible in
the display.
If necessary, correct number entered
with the
CLR soft key. Press soft key
briefly to delete the last digit entered;
press soft key and hold to delete the
complete number.
After correct telephone number has
been entered, press s button.
Phone book
The numbers stored in the phone book of
the mobile telephone can be called up
either by name or number.
In addition, incoming calls are stored in the
phone book.

Searching and calling up phone book
entries by nameYou can access your mobile
telephone’s phone book with the audio
system. You can access both the main
entries and the sub-entries of your
phone book.
Press MEM soft key or press
button‚ orƒ.
Press desired numerical key 2
to 9.
The stored entries are selected
according to the alphabetical order
of the initial letters (e.g. for
S-Schneider, press button 7
four times).
or
iIf the telephone number has been saved to-
gether with a name in the phone book, the name
will appear in the display.
iThis is only possible, however, when the call
information transmitted includes the number of
the person calling. If the telephone number is not
transmitted,
NO NUMBER will be stored in the
phone book.


216 Controls in detail
Audio system
Press and hold button ‚
orƒ.
The system jumps from one initial
letter to the next in ascending or
descending order.
Press and hold button ‚
orƒ until desired initial letter
has been reached.
or
Press button ‚ or ƒ
repeatedly until desired entry has
been reached.
The stored entries are selected in
alphabetical order with the
sub-entries.
When you have selected a number,
press s button.
The call will be made.

Viewing the telephone number of a
phone book entry
Search for desired entry.
Press NUM soft key.
The telephone number of the phone
book entry appears in the display.

Returning calls received
Press MEM soft key or press
button‚ orƒ.
Press RCV soft key (received calls).
The number of received calls and
then the call last received appear
briefly in the display.
Select desired telephone number
with button ‚ or ƒ.
The letter
R and the number of the
memory position appear in the
upper left-hand corner of the
display. The numbers are stored in
the order of the calls received.
When you have selected a number,
press s button.
The call will be made.
iSeveral sub-entries can be stored for each
main entry (name). These entries are marked by
a corresponding abbreviation that appears in the
upper left-hand corner of the display. The
following abbreviations for sub-entries are possi-
ble:
CEL = Mobile phone
HOM = Home
WOR = Work
FAX = Fax
PAG = Pager
TEL = Main

217 Controls in detail
Audio system

Speed dial
If you have stored telephone numbers
as speed dial numbers in your
telephone, you can also enter these
with buttons 1 to R on the radio
unit.
Press desired button 1 to R
briefly.
Press s button.
The call will be made.

Turbo dial
If you have stored telephone numbers
as turbo dial numbers in your
telephone, you can also enter these
with buttons 1 to R on the radio
unit.
Press desired button 1 to R
until the call is made.Redial
If the number you have dialed is busy, you
can again place calls to the last ten
telephone numbers dialed using the redial
function.

Manual redial
Press s button.
The telephone number last dialed
will appear in the display.
Select desired telephone number
with button ‚ or ƒ.
The letter
L and the number of the
memory position appears in the
left-hand corner of the display. The
numbers are stored in the order of
the calls received.
When you have selected a number,
press s button.
The call will be made.
Accepting an incoming call
If the telephone is active in the background
(reception symbol is visible in the display),
the audio source is muted when an incom-
ing call is received. A ringing tone can be
heard and the caller’s telephone number,
or the name under which the telephone
number has been saved in the telephone
book, appears in the display. If the caller’s
number is not relayed,
CALL will appear in
the display.
Press s button.
The call is accepted.
iIf you have activated the automatic redial
function on your mobile telephone, the number
of the person being called is automatically redi-
aled after a short waiting period if there is a busy
signal.
Refer to the separate operating instructions for
the mobile telephone.

218 Controls in detail
Audio system
Muting a call
It is possible to mute a call; the caller is
then no longer able to hear you.

Mute on
PressMUT soft key.
MIC MUTE will appear in the display.

Mute off
PressMUT soft key again.
Terminating a call
Press t button.
The current call is terminated and the
muted audio source becomes active
again.Accepting a second incoming call
If you receive another call during an
already active call, you can accept the
second call and switch between the two.

Accepting a second call
Place new call by entering
telephone number manually.
You are connected to the second
caller; the first caller is kept on hold.

Switching between calls
Press s button.
This switches between the calls.
The non-active call is kept on hold.

Terminating a call
Press t button.
The current call is terminated. The
connection to the caller previously
kept on hold is also interrupted;
however, reconnection is indicated
by an acoustic signal.Placing a second call
If you wish to place another call during an
already active call, you can place the
second call and switch between the callers
or combine them into one call. Note that
this feature is dependent on availability
from your mobile phone service provider.

Placing a second call
Place a new call by entering
telephone number manually.
Press s button.
You are connected to the second
caller; the first caller is kept on
hold.

Terminating a call
Press t button.
The current call is terminated. The
connection to the caller previously
kept on hold is also interrupted;
however, reconnection is indicated
by an acoustic signal.
iYou will be notified of the second call acous-
tically, but you will not see this in the display.

219 Controls in detail
Audio system

Combining two calls
Press s button.
The calls are combined into one
call.

Terminating a combined call
Press t button.
The connection to both callers is
terminated.
Emergency calls “911”
The following describes how to dial a “911”
emergency call using the audio system
head unit when a Mercedes-Benz specified
mobile phone* is inserted in the phone
cradle*. Unless otherwise specified, the
descriptions refer to the audio system
head unit.
Consult the separate telephone operating
instructions that came with your mobile
phone* for information on how to place a
“911” emergency call on the mobile
phone*. The following conditions must be met for a
“911” emergency call:

Telephone must be switched on.

The corresponding mobile communica-
tions network must be available.
If you cannot make an emergency call, you
will have to initiate rescue measures
yourself.
GSM network phones
Placing a “911” emergency call using
audio head unit with the phone locked
Press hbutton to switch to
telephone operation.
PIN? appears in the audio display.
Enter 911 using the number keypad on
the audio head unit.
Warning!G
The “911” emergency call system is a public
service. Using it without due cause is a crim-
inal offense.
iEmergency calls may not be possible with all
telephone networks or if certain network servic-
es and/or telephone functions are active. Check
with your local service providers.