MERCEDES-BENZ C300 4MATIC 2008 W204 Owner's Manual

180 Controls in detail
Audio system
Audio display
The audio display has a protective cover.Audio display cover
1Opening buttonOpening: Press opening button1.
The audio display cover opens, the au-
dio display is visible, and the audio sys-
tem switched on.
Closing: Press the audio display cover
down until it engages.
If the audio system is still switched on,
you can continue to listen to the radio
or a CD and operate the device via the
buttons on the audio control panel.
!Do not place any objects on the cover of the
audio display. This may obstruct the movement
when the cover is being opened/closed. The
cover could be damaged. Do not place any ob-
jects in front of the audio display and/or secure
any objects to the audio display itself. The audio
display could be damaged.
Avoid touching the audio display at all times. The
display has a very sensitive high-gloss surface,
there is a risk of it being scratched. Do not press
directly in the display face. Otherwise, the audio
display will be damaged.
iFor information about cleaning and care of
the audio display, see “Audio display”
(
page 371).
iYou cannot operate the audio system via the
audio controller when the protective cover is
closed.

181 Controls in detail
Audio system
Display
The currently selected mode and the asso-
ciated menus are shown on the audio dis-
play. The audio display is divided into
several areas.
For example, radio selected
1Menu bar
2Main area
3Status lineThe status line3 displays the time and
the current settings for radio and
telephone mode.
You can request the required function
using the menu bar1.
The selection is made using the audio con-
troller.Mobile phone readiness is indicated by
additional information being shown in the
status line:

In the main menu TEL: Name of the
Bluetooth® device (calls made and re-
ceived via the Bluetooth® interface).

Mobile phone network signal
strengthI. This information will
only be shown with suitable tele-
phones.

Receiver symbol 4 ö
In this example, the audio main function is
set to the radio mode and the main
area2 is active.
iThe layout of the menus may vary depending
on your vehicle’s equipment. This manual shows
the menus for a fully equipped vehicle.

182 Controls in detail
Audio system
Instrument cluster multifunction
display
This section describes features and con-
trols via the audio control unit, display and
controller only.
Please refer to the “Instrument cluster
control system” section of this manual
(
page 151) for function descriptions and
operation of the instrument cluster multi-
function display and multifunction steering
wheel buttons as they relate to audio func-
tions described in this section.Audio controller
1Audio controller
The menu functions are selected on the
audio display using the audio controller.
For this purpose, a selector bar is moved.
In this way, you can open menus or lists,
move within menus or lists, and quit
menus or lists.
Operating audio controller
The audio controller features the following
options:

press briefly or press and hold n

rotate to the left or right ymz

slide to the left or right omp

slide up or down qmr
iYou cannot operate the audio system via the
audio controller when the protective cover is
closed.

183 Controls in detail
Audio system
SymbolHow to use the audio controllerFunction
n
Press briefly.
Confirms the selecting of a menu item or list entry.
Press and hold until the selected ac-
tion has been carried out.
Save a station.
ymz
Rotate.
Move through vertical or horizontal menus or through lists.

Move through text.

Program settings.
qmr
Slide.
Move through vertical menus or lists.

Exit horizontal menus.
omp
Slide.
Move through horizontal menus.

Exit vertical menus.
Slide and hold.
Fast forward or reverse for audio CD playback.

184 Controls in detail
Audio system
Back button
1 Back buttoníSwitching to the next highest menu:
Press buttoní briefly.
The audio system switches to the next
highest menu level within the currently
active mode.
Switching to the main menu: Press
and hold buttoní.
The audio system switches to the basic
menu of the currently active mode.Clear button
1Clear buttonî
To delete an individual character:
Briefly press the buttonî.
To delete an entire entry: Press and
hold the buttonî until the entry is
deleted.
iYou can also exit a menu or list by sliding the
audio controller
ompor qmr.

185 Controls in detail
Audio system
Menu
The illustration below shows the structure
of the modes and their menus.Each mode has a basic menu. In the menu
line of the basic menu display are several
menu items listed.Each menu item in turn has several sub-
menu items.
ButtonMode/Basic menuMenuPage
bRadioRadio (FM/AM)194
Weather Band194
Sat Radio*200
Presets198
Sound189
éDiscCD/MP3208
Track list/folder list219
CD changer*214
Sound189
hTelephone*Telephone*222
Name233
Call lists236
êSystemSystem192
Language193

186 Controls in detail
Audio system
Calling up an operating mode
Press the respective button
(b,é,h,orê) on the
audio control unit.
The basic menu of the selected mode
appears in the audio display. The main
area is active.
The active area is highlighted.
Illustration: radio function basic menu
Moving to the menu bar: Slidemr.Horizontal menus
Moving through the menu bar:
Slideomp or rotate ymz.
A white bar under the menu indicates
the selected menu.
Confirm the selected menu item:
Press n.
Exiting the menu bar without con-
firming a selection: Slide qmin the
opposite direction of the list orienta-
tion.
or
Press buttoní.Vertical submenus
Moving through the menu:
Slideqmr or rotate ymz.
A white bar under the submenu indi-
cates the selected submenu.
Confirm the selected submenu
item: Press n.
Exiting a menu without confirming a
selection: Slide ompin the opposite
direction of the list orientation.
or
Press buttoní.
iThe following screens show the audio dis-
play's day design. The appearance of the high-
lighted items in the menu will vary depending on
the display design.

187 Controls in detail
Audio system
Example of how to use the audio
system
Example: direct frequency input,
FM 104.5 MHz.
In the descriptions below, the mode always
serve as the starting point for locating the
individual menu items.
Example:
b

Radio
Enter Frequency
The individual steps for the above-men-
tioned example are described below.
Press buttonb on audio control
unit repeatedly until desired waveband
FM has been selected.
Switching to the menu bar:
Slidemr.
Selecting “Radio” in the menu bar:
Slideomor rotate ymz.
Confirming selection: Press n.
The
Radio menu is selected and a list of
submenus appears.
Selecting “Enter Frequency” in the
“Radio” menu: Slidemr.
Confirming selection: Press n.
The
Enter Frequency submenu ap-
pears.
Enter 1045 with the keypad on the au-
dio control unit.
The audio system tunes in to the
frequency entered.
iIt is not possible to enter a frequency in the
respective waveband which is outside the fre-
quency range. Frequencies within the current
frequency range, but outside the current fre-
quency step width are rounded to the next lower
allowed frequency.

188 Controls in detail
Audio system
Operation
In the following descriptions, an operation
step is described as in example below.
b
Radio
Enter Frequency
is the short for
Press buttonb on audio control
unit repeatedly until desired waveband
has been selected.
Slidemr.
Slideomor rotate ymz the audio con-
troller to select
Radio.
Press the audio controller n.
The
Radio menu is selected and a list of
submenus appears.
Slideqmor rotate ymz the audio con-
troller to select
Enter Frequency.
Press the audio controller n.
The
Enter Frequency submenu is
selected and appears in the audio
display.Switching audio system on or off
Rotary control/push buttono
1Push buttono
2Rotary control
Switching on: Press push
buttono.
or
Open the audio display cover.
or
If the audio system was on as you
switched off the ignition, turn the
SmartKey in the starter switch to
position2.The audio system will come back on
with the last selected function.
Switching off: Press push
buttono.
or
Turn the SmartKey in the starter switch
to position0.
iIf the audio system is switched on without
the SmartKey in the starter switch, it will
automatically switch off again after
approximately 30 minutes.
If your vehicle is equipped with a telephone*, the
audio display may prompt you to enter your PIN
(GSM network) or passcode (CDMA network).
iShould excessively high temperatures occur
while the audio system is being operated,
HIGH TEMP will appear in the audio display, after
which the audio system will be switched off for a
cooling-down period.
iWhen you switch off the audio system, you
also switch off the currently playing audio source
and the telephone* operating via audio control
unit is not possible.

189 Controls in detail
Audio system
Adjusting volume
Rotary control/push buttono
1Push buttono
2Rotary control
Adjusting: Turn rotary control2.
The volume will increase or decrease
depending on the direction turned.Adjusting volume for telephone calls
In hands-free mode, you can adjust the vol-
ume of a telephone call while the call is
currently active.
During a telephone call:
Turn rotary control2.
The volume will increase or decrease
depending on the direction turned.
Sound
To switch on/off: Press button F
on the audio control unit (
page 177).
The sound of the current audio source
is switched on or off.Selecting sound settings
You can select different sound settings for
each individual audio source. The particu-
lar
Sound menu can be opened from the
basic menu for the desired operating
mode, or by pressing the TONE button on
the audio control unit.
Example:
b

Sound
Bass
Adjusting bass or treble
Press TONE button repeatedly until
Bass or Treble appears in the audio
display.
or
Select Sound
Bass or Treble.
The setting last selected is indicated by
an red pointer.
iThe volume of the audio system or a tele-
phone call can also be adjusted by pressing the
æ or ç button on the multifunction steer-
ing wheel (
page 158).
iWhen the sound is switched off, the
symbolF appears in the status line.
If you change the audio source, or alter the vol-
ume, the sound is automatically switched on
again.