2014 MERCEDES-BENZ C-Class USB port

on the line can hear nothing from your vehi-
cle.
X To switch on: selectMic On
Mic On and press
0098 to confirm.
The message: The microphone is on
The microphone is on
appears briefly.
The 004Dsymbol disappears.
Sending DTMF tones i
This function is not supported by all
mobile phones.
Answering machines or other devices can be
controlled by DTMF tones, e.g. for remote
query functions.
X During an active call, press the respective
keys on the number keypad.
Every character selected will be transmit-
ted immediately.
or
X To select a character: slide009500520096or turn
00790052007Athe controller.
X To confirm your selection: press0098the
controller.
X To send a phone book entry as a DTMF
sequence: selectName
Name by turning 00790052007A
the controller and press 0098to confirm.
X Select the desired phone book entry and
press 0098to confirm.
The entry is sent as a DTMF character
string.
X To return to the call display: select
Back
Back and press 0098to confirm. Using the phone book
Introduction
If the mobile phone supports downloading
contacts via PBAP (Phone Book Access Pro-
file), the mobile phone book will automatically
download to the Audio 20 system when con-
nected. You can also import contacts to the
phone book from a USB device or use Blue-
tooth ®
to receive vCards. i
The phone book can store between 1,000
and 2,000 entries, depending on the size of
the entries. Imported vCards are given pri-
ority when storing and overwrite existing
PBAP contacts if the memory is full.
i Imported contacts are stored perma-
nently in the phone book. For this reason,
you should delete the call lists before sell-
ing the vehicle. Importing external data
Receiving vCards (via the Bluetooth ®
interface) Received vCards are identified by the
00BA
symbol.
You can import vCards from external Blue-
tooth ®
-capable phones into the address
book. Please bear the following in mind:
R Bluetooth ®
must be active on Audio 20 and
on the external Bluetooth ®
-capable tele-
phone; see (Y page 33) and the operating
instructions of the respective mobile
phone.
R the external Bluetooth ®
phone must be
able to send vCards via Bluetooth ®
(see the
operating instructions of the respective
mobile phone).
i If you switch to another operating mode
during vCard reception (e.g. if you press the
002A button), vCard reception is canceled.
X Select Phone
Phone using the controller (slide
0052 0064,009500520096or turn 00790052007A) and press 0098to
confirm. 52
Using the phone bookTelephone

X
Select Download Contacts
Download Contacts and press0098
to confirm.
A submenu is displayed.
X Select Receive Business Card(s) Receive Business Card(s) and
press 0098to confirm.
The Bluetooth ®
connection between
Audio 20 and your active mobile phone is
interrupted. Audio 20 is now ready to
receive vCards from other mobile phones.
X Start data transfer on the external Blue-
tooth ®
phone (see the operating instruc-
tions of the respective mobile phone).
The data on the vCards is automatically
transferred to the address book. The num-
ber of vCards received is displayed.
X To cancel reception: selectBack
Back and
press 0098to confirm or switch to a different
operating mode.
Importing from a USB device Imported USB device entries are marked with
the 00BB symbol.
The following conditions must be fulfilled in
order to import vCards:
R vCards (vcf files) can be placed in folders.
Audio 20 allows you to select the relevant
folders directly.
R vCards must have the file extension "vcf".
i A vCard file can also contain several
vCards.
Audio 20 supports vCards in versions 2.1
and 3.0. X
Select Phone
Phone from the telephone basic
menu by sliding 00520064and turning 00790052007Athe
controller and press 0098to confirm.
X Select Import Contacts Import Contacts and press0098to
confirm.
A menu appears.
X Select From USB Device From USB Device from the menu
by turning 00790052007Athe controller and press
0098 to confirm.
X Select Add
AddorOverwrite
Overwrite and press0098to
confirm.
Add Add imports the entries from the USB
device to the phone book.
Overwrite Overwrite imports the entries from the
USB device and overwrites all entries in the
phone book marked with the 00BBsym-
bols. The previous entries are then no lon-
ger available.
After the contact data has been imported
successfully, you will see a message to this
effect. The corresponding telephone basic
menu appears.
i You can select the Overwrite Overwritemenu item
if the phone book already contains corre-
sponding entries. A message notifies you if
the phone book is full. Calling up the phone book
Overview X
Select Name
Name using the controller (slide 00520064,
009500520096 or turn 00790052007A) and press 0098to con-
firm.
If the phone book contains entries, these will
be displayed in alphabetical order. The char-
acter bar will be shown in the lower section
and is active.
The character bar serves to reduce the num-
ber of entries needed. Using the phone book
53Telephone Z

X
To switch from the character bar to the
list: slide 00520097the controller or press 0098
repeatedly until the character bar disap-
pears.
X To switch from the list to the character
bar: press the 003Dbutton on the control-
ler.
Symbol overview Symbol Explanation
00D7
Contact imported from a
mobile phone that supports
PBAP
00BB
Entry imported from a USB
device
00BA
Entry imported via the Blue-
tooth
®
interface Selecting an entry using the character
bar Selecting a character from the character
bar
X
First switch to the character bar when the
list appears.
You determine the first letter of the entry you
are looking for with the first character you
enter.
X Slide 009500520096or turn 00790052007Athe controller.
X To confirm your selection: press0098the
controller. The first entry in the list that starts with the
letter selected is highlighted. If there are sim-
ilar entries, the next different character is
shown. For example, with entries such as
Hilden
Hilden andHilgers Hilgers, the beginnings of the
names are similar. In this case, you will be
offered a choice between D Dand G
G.
X Select the characters of the entry you are
searching for one by one and press 0098to
confirm.
As soon as the selection is unambiguous,
Audio 20 automatically switches to the list.
X To complete the search: switch from the
character bar to the list.
The first list entry is automatically high-
lighted.
Changing the language of the character
bar
X Select 0054and press 0098to confirm.
X Select the desired language and press 0098
to confirm.
Changing the character set of the charac-
ter bar
X Select 0042and press 0098to confirm.
Depending on the previous setting, the
entry mode changes to special characters
or to letters with numbers.
Selecting an entry directly from the list Using the controller
X
You can switch to the list after the charac-
ter bar appears.
X Turn 00790052007Aor slide 009700520064the controller to
select an entry and press 0098to confirm. 54
Using the phone bookTelephone

i
If a disc contains other files in addition to
music files, the loading time is longer.
Inserting a disc into the single CD drive X
Press the 0062button.
If there is a disc already inserted, it will be
ejected.
X Take the disc out of the slot.
X Insert a disc into the slot.
If a suitable data medium is correctly
inserted, the drive draws it in and plays it.
Removing a disc from the single CD
drive X
Press the 0062button.
X Take the disc out of the slot.
If you do not take the disc out of the slot,
the drive will draw it in again automatically
after a short while. Connecting a USB device
The USB port is located under the center con-
sole armrest.
Electrical consumption at this connection
must not exceed a continuous current of
500 mA. If the electrical consumption is
higher, use a separate source to provide
power for the USB device (e.g.
12 V power supply).
The following data formats are supported:
R AAC, M4A: fixed and variable bit rates (Low
Complexity Profile)
R MP3, WMA: fixed and variable bit rates up
to 320 kbit/s
X Connect the USB device (e.g. USB stick) to
the USB port. Switching to audio CD or MP3 mode
Option 1 X
Insert the CD (Y page 68) or connect the
USB device (Y page 69).
Audio 20 loads the inserted medium and
playback starts.
Option 2: X
Press the 003Abutton one or more times.
i Pressing the button repeatedly changes
the operating mode in the following order:
R Audio CD/MP3 (disc)
R USB storage device
R Operation with the Media Interface
R Bluetooth ®
audio mode
R Audio AUX
X Select an audio medium from the media
list.
Option 3 X
Select Audio Audiofrom the main function bar
using the controller (slide 00970052and turn
00790052007A ) and press 0098to confirm.
The last active audio source is now acti-
vated.
You can activate a different audio source
using the audio menu.
X Select Audio Audiousing the controller (slide
00970052and turn 00790052007A) and press 0098to con-
firm.
The audio menu appears.
X Select Disc
Disc, USB USBStorage
Storage, Media
MediaInter‐
Inter‐
face
face orBluetooth
Bluetooth audio
audio and press 0098to
confirm.
This switches to the desired audio source.
X Select an audio medium from the media list
(Y page 70). Audio CD and MP3 mode
69Audio Z

Selecting a track
Selecting by skipping to a track X
To jump forwards or backwards to a
track: turn00790052007Athe controller when the
display/selection window is active.
or
X Press the 0048or0049 button.
The skip forward function skips to the next
track.
The skip back function skips to the begin-
ning of the current track if the track has
been playing for more than eight seconds.
If the track has been playing for less than
eight seconds, it skips to the start of the
previous track.
If the Random Tracks
Random Tracks orRandom Folder Random Folder
playback option has been selected, the
track order is random.
X On the multifunction steering wheel:
switch to audio CD or MP3 mode on the
Audio 20 system (Y page 69).
X Press the 0059or0065 button to select the
Audio
Audio menu.
X Press the 0063or0064 button briefly.
X Press and hold the 0063or0064 button
until the desired track has been reached.
If you press and hold the 0063or0064 but-
ton, the rapid scrolling speed is increased.
Not all audio drives or data carriers support
this function.
If track information is stored on the audio
device or medium, the multifunction display
will show the number and name of the track.
Selecting a track using the number key-
pad X
Press the 0056key on the number keypad.
A numerical entry field appears. The num-
ber of positions offered corresponds to the
number of tracks on the CD. Only numbers that correspond to a track number on the
CD can be entered.
X Enter the desired track number using the
number keys.
The track plays after the last possible num-
ber is entered.
i Pressing and holding a number key for
more than two seconds completes the
entry, and the corresponding track is
played. Selecting by track list
Calling up the track list Option 1
X
Press 0098the controller when the display/
selection window is active.
Option 2:
X In audio CD, MP3 or USB audio mode,
select Tracklist Tracklist ,Folder
Folder orMusic
Music using
the controller (slide 00520064and turn 00790052007A)
and press 0098to confirm.
The track list appears. The 0036dot indicates
the current track.
Selecting a track X
Select the desired track by turning 00790052007A
the controller and press 0098to confirm.
The track is played. Selecting a folder
i This function is only available in MP3
mode (CD and USB).
X Select Folder Folder orMusic
Music from the menu bar
by sliding 009500520096the controller and press
0098 to confirm.
or
X Press 0098the controller when the display/
selection window is active.
The folder list appears. Audio CD and MP3 mode
71Audio Z

X
Select the desired folder by turning 00790052007A
the controller and press 0098to confirm.
You will see the tracks in the folder.
X Select a track and press 0098to confirm.
The track is played. Fast forwarding/rewinding
X Slide 009700520064the controller to select the dis-
play/selection window.
X Slide 009500520096the controller and hold it until
the desired position has been reached.
or
X Press and hold the 0048or0049 button. Displaying metadata (MP3 mode)
When playing MP3 files, Audio 20 can also
display the name of the album and the artist
(metadata). This is only possible if the meta-
data has been previously entered into the
system.
For USB devices, you can choose whether to
display the file name and folder during play-
back.
i If the metadata characters are not dis-
played correctly, the Display Track Display Track
Information
Information option should be deacti-
vated.
X To display the album and artist name:
select MP3
MP3orUSB Storage
USB Storage in the basic
display using the controller (slide 00520064and
turn 00790052007A ) and press 0098to confirm.
X Select Display Track Information
Display Track Information and
press 0098to confirm.
This switches the track information display
on 0073 or off 0053. Selecting an active partition (USB
mass storage devices only)
You can select this function for USB mass
storage devices when the storage device is partitioned. Up to four partitions (primary or
logical; FAT format) are supported.
i
The Windows formatting program sup-
ports FAT partitions of up to 32 GB as
standard.
X Select USB Storage USB Storage using the controller
(slide 00520064and 00950052 ) and press 0098to con-
firm.
X Select Select Active Partition
Select Active Partition and
press 0098to confirm. Playback option
The following options are available to you:
R Normal Track Sequence
Normal Track Sequence
The tracks are played in the normal order
(e.g. 1, 2, 3, etc.).
R Random Tracks
Random Tracks
The tracks are played in random order (e.g.
3, 8, 5 etc.).
R Random Folder Random Folder (only in MP3 mode)
The tracks in the currently active folder are
played in random order.
X To select an option: selectCD/MP3 CD/MP3.
The options list appears. The 0036dot indi-
cates the option selected.
X Select an option.
The option is switched on. For all options
except Normal Track Sequence Normal Track Sequence , a corre-
sponding display will appear in the main
area.
i The Normal Track Sequence Normal Track Sequence option is
automatically selected when you change
the disc you are currently listening to or
when you select a different medium. If an
option is selected, it remains selected after
Audio 20 is switched on or off. 72
Audio CD and MP3 modeAudio

Notes on MP3 mode
General notes i
Depending on the volume and format of
the MP3 data, the length of time required
for reading the data may increase.
Permissible data carriers R
CD-R and CD-RW
R USB storage device
Permissible file systems R
ISO 9660/Joliet standard for CDs
R FAT16 or FAT32 for USB storage media
Multisession CDs For multisession CDs, the content of the first
session determines how Audio 20 will proc-
ess the CD. Audio 20 plays only one session
and gives priority to the audio CD session.
If possible, use Audio 20 to play only CDs that
have been written in one session.
File structure of a data carrier When you create a disc with compressed
music files, the tracks can be organized in
folders. A folder may also contain subfolders.
A disc can contain a maximum of 255 folders.
Each folder can contain a maximum of
255 tracks and 255 subfolders. A maximum
of 512 files are permitted on an MP3 CD.
The disc may contain no more than eight
directory levels. Files beyond the eighth level
will not be recognized by the system.
Track and file names Audio 20 does not support ID3 tags. Music
files can contain meta information such as
artist, album or track names. Audio 20 dis-
plays this information during playback.
When you create a disc with compressed
music files, you can assign names to the tracks and folders. Audio 20 displays these
names if no meta information is available.
If MP3 or WMA files are stored in the root
directory itself, the root directory will also be
treated as a folder. Audio 20 will then show
the name of the root directory as the folder
name.
You must observe the following when assign-
ing track names:
R track names must have at least one char-
acter.
R track names must have the extension
"mp3" or "wma".
R there must be a dot between the track
name and the extension.
Example of a correct track name:
"Track1.mp3".
Permissible formats Audio 20 supports the following formats:
R
MPEG1 Audio Layer 3 (MP3)
R Microsoft Windows Media Audio V2, V7, V8
and V9 (WMA)
R music files in AAC format with the aac and
m4a extension, but not copy-protected
iTunes music files with the extension m4p.
i If a disc contains other files in addition to
music files, the loading time is longer.
i The MP3 audio encoding method is under
license from Fraunhofer IIS (Institut Integ-
rierte Schaltungen – Institute for Integrated
Circuits) and Thomson.
Permissible bit and sampling rates Audio 20 supports the following types of
MP3
files:
R fixed and variable bit rates from 32 kbit/s
to 320 kbit/s
R sampling rates of 8 kHz to 48 kHz Audio CD and MP3 mode
73Audio Z

Using the
003A
003Abutton X
Press the 003Abutton one or more times.
i Pressing the button repeatedly changes
the operating mode in the following order:
R Audio CD/MP3 (disc)
R USB storage media
R Operation with the Media Interface
R Bluetooth ®
audio mode
R Audio AUX
Using the media list X
Select Bluetooth Audio
Bluetooth Audio in the media list
by turning 00790052007Athe controller and press
0098 to confirm (Y page 70).
Audio 20 activates the connected device.
You will see a message to this effect. The
basic display then appears.
i If the Bluetooth ®
audio device connected
supports metadata and corresponding data
is available, then the artist, track and album
name can be displayed.
Bluetooth ®
audio basic display Basic display: Bluetooth
®
audio with the single CD
drive (example)
0043 Track name
0044 Current playback settings (no symbol for
"Normal track sequence")
0087 Sound settings
0085 Album name
0083 Media list 0084
To stop 00DBor start 00D0playback
006B Data medium position in the media list
006C To connect a Bluetooth ®
audio device, to
increase the volume on Audio 20
006D Bluetooth ®
audio data medium type Starting/stopping playback
X To start playback: select00D0using the
controller (slide 00520064and turn 00790052007A) and
press 0098to confirm.
Playback starts. 00DBis selected.
X To stop playback: select00DBby turning
00790052007Athe controller and press 0098to con-
firm.
A message appears. 00D0is selected.
X To resume playback: select00D0by turn-
ing 00790052007Athe controller and press 0098to
confirm.
A message appears. 00DBis selected. Starting playback if the Bluetooth
®
audio device has been stopped
During the search for mobile phones
(Y page 44), the connection with the Blue-
tooth ®
audio device is terminated. In the
Bluetooth ®
audio basic display (Y page 48),
you will see the No Bluetooth Audio No Bluetooth Audio
Device Connected
Device Connected message and theCon‐
Con‐
nect Last Device
nect Last Device menu item cannot be
selected while the system is searching for
mobile phones.
When the search is finished, the Bluetooth ®
audio device can be reconnected.
X Confirm Connect Last Device
Connect Last Device by press-
ing 0098.
Depending on the Bluetooth ®
audio device
used, playback starts immediately or you
must start playback manually.
In this case, you will see the Bluetooth Bluetooth
Audio Device Paused
Audio Device Paused message.78
Bluetooth AudioAudio