2007 MERCEDES-BENZ C350 4MATIC ECO mode

193 Controls in detail
Audio system
Adjusting balance
Press P button repeatedly until
BALANCE appears in the display.
Press X or Y soft key.
The volume is distributed between the
left and right sides of the vehicle.
or
Press RES soft key briefly.
The balance is reset to its center level.
The radio switches back to the
standard radio menu 8 seconds after
the last button is pressed.Returning volume distribution to
factory settings
Press P button to call up settings
menu in the display.
Press RES soft key briefly; the
respective volume distribution is reset
to its center (flat) level.
or
Press and hold RES soft key until RESET
appears in the display.
The volume distribution settings for
fader and balance are set to their
center level.
The radio switches back to the
standard radio menu 4 seconds after
the last soft key is pressed.Telephone* muting
If your vehicle equipment includes a
Mercedes-Benz specified mobile
telephone*, you can adjust its volume
separately from the volume of the audio
system while the telephone is being used.
Connecting an external audio source
(AUX) to the radio*
An optional dealer-installed cinch-connec-
tor* for connecting an external audio
source may become available for your
vehicle model. Feature description is
based on preliminary information at time
of printing. Contact an authorized
Mercedes-Benz Center for availability.
You can adjust the volume (page 190),
the sound settings (
page 191) and the
volume distribution (
page 192) for the
AUX input.
Calling up AUX mode
Press and hold Q button until AUX
appears in the display.

201 Controls in detail
Audio system
The radio saves the current station at
the memory preset selected. The
memory preset selected appears in the
status line, e.g. S3.
Calling up the ESN information menu
Press INF soft key.
Press ESN soft key.
The twelve-digit electronic serial
number (ESN) of the SAT tuner*
installed in your vehicle is displayed.
Press RET soft key to exit the menu.
CD mode
Safety precautions
General notes
The system may not be able to play audio
CDs with copy protection.
Playing copied CDs may cause
malfunctions during playback.
iThere are ten presets available.
An existing entry is overwritten in the memory
list when a new entry is given.Warning!G
The single CD player and the CD changer*
are Class 1 laser products. There is a danger
of invisible laser radiation if the housing is
opened or damaged.
Do not open the housing. The single CD
player and the CD changer* do not contain
any parts that can be serviced by the user.
For safety reasons, have any service work
which may be necessary performed only by
qualified personnel.
Warning!G
In order to avoid distraction which could
lead to an accident, the driver should insert
CDs with the vehicle at a standstill and
operate the audio system only if permitted
by road, weather and traffic conditions.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h), your car covers a
distance of 44 feet (approximately 14 m)
every second.
!If you affix stickers to the CDs, they can be-
come warped due to the heat that develops in
the CD drive or CD changer*.
In certain situations, the CDs can then no longer
be ejected and cause damage to the drive. Such
damage is not covered by the Mercedes-Benz
Limited Warranty.

203 Controls in detail
Audio system
Compatible file systems and compres-
sion methods
Use Romeo or Joliet. Depending on file for-
mat used, up to 128 characters are possi-
ble.
The following compression methods are
compatible:

MP3

WMA

WAVCompatible bit and sampling rates
Fixed and variable bit rates of up to
320 kBit/s are possible.
The following table lists possible sampling
rates:Information on copyright
The music tracks that you create for use in
MP3 mode or that you play in MP3 mode
are subject to copyright laws under appli-
cable international and national regula-
tions.
In many countries, the reproduction of
copyrighted materials is not permitted,
even if only for personal use, without the
express prior consent of the copyright
holder.
Please check the current copyright laws
for your country and comply with them.
These restrictions do not apply, for exam-
ple, to your own compositions and record-
ings, or for recordings for which
authorization has been obtained from the
copyright holder.
MPEG1
Audio Layer344.1 KHz, 48 KHz,
32 KHZ
MPEG2
Audio Layer322.5 KHz, 24 KHz,
16 KHz
MPEG2.5
Audio Layer311.025 KHz,
12 KHz, 8 KHz
WMA32 KHz, 44.1 KHz,
48 KHz
iOnly use MP3 tracks with a bit rate of 128
kBit/s or higher and with the specified sampling
rates.
The use of rates other than those specified may
lead to noticeably inferior sound quality.

208 Controls in detail
Audio system
Pause function
The CD changer mode is interrupted by an
incoming call on the telephone*
(
page 212).

Switching on pause function
Press U button.
The CD changer mode is
interrupted and
PAUSE appears in
the display.

Switching off pause function
Press U button.
The CD changer mode is active
again.Track and time display
Press T soft key.
The number of the track being played
and the elapsed playing time appear in
the display.
Press T soft key again.
The total number of tracks and the total
playing time of the CD appear in the
display.
Press T soft key.
The standard CD playback menu
appears in the display.
GSM 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 cellular telephone*.
If your audio system is set up for telephone
operation, the tsymbol 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.

209 Controls in detail
Audio system
Switching on the telephone
Switching on the telephone
Pressh button.
If the telephone was previously
switched off,
PROCESSING appears in
the display and you will then be
prompted to enter your PIN.
Switching off the telephone
Pressh button for approx.
3 seconds.
PROCESSING appears in the display until
the telephone is off. Afterward,
PHONE OFF appears in the display.PIN entry
Enter PIN number using buttons 1
to R.
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
PIN.
READY or ROAMING will appear 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.
Adjusting sound
Adjust sound during a telephone call.
Sound adjustment (
page 191).
iIf the PIN is entered incorrectly three times,
NEED PUK will appear in the display. Enter PUK
via your telephone. Please refer to the separate
telephone operating instructions for more
information.
iThe volume can be adjusted separately for
telephone mode and audio mode.

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.

230 Controls in detail
Loading
Roof rack*
Mount the roof rack only between the
fastening points (see arrows).
Secure the roof rack according to
manufacturer’s instructions for
installation.
Ski sack* (Canada only)
1Handle
2Cover
3Armrest
Unfolding and loading
Fold armrest3 down (arrow).
Pull handle1 and swing cover2
down.
Warning!G
Only use roof racks approved by
Mercedes-Benz for your vehicle model to
avoid damage to the vehicle.
Follow the manufacturer’s installation in-
structions. Otherwise, an improperly at-
tached roof rack system or its load could
become detached from the vehicle.
Do not exceed the maximum roof load of
220 lbs (100 kg).
Take into consideration that when the roof
rack is loaded, the handling characteristics
are different from those when operating the
vehicles without the roof rack loaded.
!Load the roof rack in such a way that the ve-
hicle cannot be damaged while driving.
Make sure

you can fully raise the tilt/sliding sunroof*.

you can fully open the trunk.
!Do not sit on or lean your body weight
against the armrest when it is folded down, as
you could otherwise damage it.

248 Controls in detail
Useful features
System self-check
Initially, after switching on ignition, mal-
functions are detected and indicated (the
indicator lamps in the SOS button, the
Roadside Assistance button• and the
Information button¡ stay on longer than 10 seconds or do not come on). The
message m
alfunction Visit workshop
appears in the multifunction display.Emergency calls
An emergency call is initiated automatical-
ly following an accident in which the emer-
gency tensioning devices (ETDs) or
air bags deploy.
An emergency call can also be initiated
manually by opening the cover next to the
interior rear view mirror labeled SOS, then
briefly pressing the button located under
the cover. See (
page 249) for
instructions on initiating an emergency call
manually.
Once the emergency call is in progress, the
indicator lamp on the SOS button will
begin to flash. The message
Connecting Call appears in the multifunc-
tion display. When the connection is estab-
lished, the message
Call connected
appears in the multifunction display. All in-
formation relevant to the emergency, such
as the location of the vehicle (determined
by the GPS satellite location system), vehi-
cle model, identification number and color
are generated.
iWhen a Tele Aid call has been initiated, the
audio system or COMAND* System unit is muted
and the selected mode (radio, tape or CD) paus-
es. The optional cellular phone (if installed) and
inserted in cradle switches off. If you must use
this phone, we recommend that you use it only
with the vehicle at a standstill in a safe location.
Remove the phone from the cradle and place the
call. The navigation* system (if engaged) will
continue to run. The multifunction display in the
instrument cluster is available for use, and spo-
ken commands are only available by pressing the
RPT button on audio system or COMAND* Sys-
tem unit. A pop-up window will appear in the au-
dio system or COMAND* System unit display to
indicate that a Tele Aid call is in progress. After
the TeleAid call has ended, the optional cellular
phone switches on again. A PIN entry might be
necessary.
Warning!G
If the indicator lamps on the SOS button, on
the Roadside Assistance button, and/or on
the Information button remain illuminated
continuously in red and/or the message
malfunction Visit workshop is
displayed in the multifunction display after
the system self-check, a malfunction in the
system has been detected.
If a malfunction is indicated as outlined
above, the system may not operate as
expected. Have the system checked at the
nearest Mercedes-Benz Center as soon as
possible.