2008 MERCEDES-BENZ SL-Class Comand Manual

65
Audio
MP3-CD operation
File structure
When creating a MP3 CD
, you can organize
MP3 tracks into folders. A folder can also
contain additional folders.
A CD may have a maximum of 255 folders
in total.
A maximum of 255 tracks are permissible
per folder.
Mathematically a maximum of 65025
tracks would result. However, this amount
is usually not reached since MP3 requires
approx. 1 MB storage per minute recorded.
Therefore a maximum of 1000 tracks will
be displayed by COMAND. Track names and folder names
When creating an MP3 CD, you can assign
names to the MP3 tracks and folders.
COMAND uses these names in MP3 mode
for the corresponding display.
Please note the following when assigning
folder and track names:
Track and folder names must contain
at least 1 character.
Track names may contain up to fifty
characters. If a name exceeds this
character limit, COMAND will not be
able to display it in full.
Track names must have the extension
“mp3”.
A period must appear between the
track name and the file extension.
Example of a correct track name:
Track1.mp3Empty folders or folders containing data
other than MP3 tracks will not be dis-
played by COMAND.
If MP3 or audio CD files are stored in the
root directory itself, th
e root directory also
counts as a folder. COMAND will then
display the root directory name as a folder
name.
i
COMAND does not support ID3tags.

66 Audio
MP3-CD operation
Permissible MP3 formats
COMAND supports the MPEG1
AudioLayer3 format.Permissible bit and scan rates Fixed and variable bit rates up to 320
kbps
Scan rates from 24 kHz - 48 kHz
The music tracks that you can create for
play back in MP3 mode are generally
copyright-protected under applicable in-
ternational and national laws.
In many countries, the reproduction of
copyrighted material is not permitted,
even if only for personal use, without the
express prior consent of the copyright
holder.
Please check the curr
ent 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.
Tips on creating MP3 tracks
i
In everyday speech, this format has
been replaced by the designation
“MP3”.
i
It is recommended to use MP3 tracks
with a bit rate of 128 kbps or higher
and with a scan rate of 44.1 kHz or
higher. Lower rates may impair quality.
Tips on copyright

67
Audio
MP3-CD operation
Activate the MP3-CD main menu
(
page 68).
or
Load an MP3-CD into the COMAND
(
page 67).
CD drive Loading an MP3-CD
Insert a MP3-CD into the slot
(
page 16). The MP3-CD should be
inserted with the label side up.
The COMAND pulls the MP3-CD into
the drive. The display changes.
Switching to MP3-CD operation
i
The MP3-CDs are played in the same
drive as normal audio CDs.
The MP3-CD drive is above the display.
WarningG
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.
WarningG
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.
i
A CD already loaded must be ejected
before inserting a new MP3-CD.
Inserting a second MP3-CD with
another CD still loaded will cause
damage to the CD drive which is not
covered by the Mercedes-Benz Limited
Warranty.

68 Audio
MP3-CD operation
After that the message Loading
Medium Please Wait
will appear.
After loading, the MP3-CD main menu
(
page 68) will appear. Playback
begins. Ejecting an MP3-CD
With the COMAND switched on, press
l
.
The system ejects the MP3-CD already
loaded.
Remove the MP3-CD from the slot.
Insert another MP3-CD into the slot.
The MP3-CD should be inserted with
the label side up.
Activate the Audio menu (page 42).
Press the MP3-CD soft key.
or
Load a MP3-CD (page 67).
The MP3-CD main menu will appear.
MP3-CD main menu
1 Current track/number of tracks on the
current MP3-CD
2 Elapsed playback ti me of the current
track
i
If you do not remove the MP3-CD from
the slot within around 15 seconds, the
COMAND will pull the MP3-CD into the
drive again.
MP3-CD main menu

69
Audio
MP3-CD operation
The first line shows the name of the
current folder. At the center you see the
currently played track.
Activate the MP3-CD main menu.
(
page 68).
Use
H or h to select a folder.
The track list only displays the tracks of
the selected folder.
Playback of the first track of the
selected folder will begin.
You can select a track:
in the track list (page 69)
with the number keypad (page 69)
with g or h (page 70)
with MP3-CD track scan (page 70) In the track list
The track list includes all tracks of the
selected folder of the currently played
MP3-CD. Only one list entry is visible at a
time.
Open the MP3-CD main menu
(
page 68).
Press
G or g .
The track list is displayed. You will see
up to 3 entries. The track shown in
black is the one currently playing.
Press G.
You move forward through the track
list.
Press g.
You move backward through the track
list. With the number keypad
The tracks of the current folder are
selected with this function.
Activate the MP3-CD main menu
(
page 68).
In short succession, press button
*
and the number key of the desired
track, e.g. 24.
After your entry wait approx. 3
seconds.
The selected track is played. The
MP3-CD main menu will appear.
Selecting a folder
Selecting a track
i
If the current folder contains less
tracks, the system will only recognize
the first digit entered and play the ap-
propriate track.

70 Audio
MP3-CD operation
Skip Track
Activate the MP3-CD main menu
(
page 68).
Forward
Press D .
The next track from the track list is
played.
Backward
Press d.
If the track has been playing for more
than approx. 10 sec onds, the track is
replayed from the start. If the playing
time is shorter, the previous track is
played. MP3-CD track scan
The tracks of the current folder can be
scanned one after the other for 8 seconds
each. Subfolders ar
e not considered.
The function will switch off automatically
when the starting is reached.
You can also manually stop the scan
search.
Starting the Scan Search
Activate the MP3-CD main menu
(
page 68).
Press the Scan soft key. Ending the scan function
Scan search is running.
Press the Scan soft key.
or
Press E.
The last scanned trac k is played back.
Activate the MP3-CD main menu
(
page 68).
Fast forward
Press and hold h.
Fast reverse
Press and hold g.
Ending the function
Release h or g .
Playback will resume.
i
If the last track in a folder is playing,
the first track is selected.
i
When you start the scan search, the
playback mode
Normal Sequence
(page 72) is automatically activated.
Fast forward/reverse

71
Audio
MP3-CD operation
On
Press
J during playback.
The MP3 CD operation is muted and
the ß symbol is displayed on the
status bar.
Off
Press J again.
Playback will resume.
The ß disappears from the status bar. The following options are available:
Normal Sequence (page 72)
Folder Mix (page 72)
CD-ROM Mix (page 72)
Repeat Track (page 72)
Repeat Folder (page 72)
Activating playback mode
E.g.:
Option
Normal Sequence
Press the Setting soft key.
The Settings menu is displayed.
Use g or G to select the playback
mode
Normal Sequence.
Press E.
The option is activated. Wait a few
seconds for the MP3-CD main menu to
appear.
Muting
i
COMAND will also deactivate muting if
you
select another audio source (e.g.
radio)
change the volume
press either g or h .
Playback mode
OptionSymbol
Function active_
Function not active-

72 Audio
MP3-CD operation
Explanation of the Playback Options
Normal Sequence
The tracks of the current folder are
played in order on the disc.
If the current folder contains sub-
folders:
The sub-folders and their tracks are
played in order on the disc.
The current folder does not contain
sub-folders:
The track of the folder next on the disc
is played back.
Folder Mix
The tracks of the current folder and its
sub-folders are played in random order.
CD-ROM Mix
All tracks of the MP3-CD are played in
random order.
Repeat Track
The system repeats the current track
until you switch the function off.
Repeat Folder
The system repeats the tracks of the
current folder until you switch the
function off. Folder
Use the
Folder option to navigate
through the structure of an MP3-CD.
Opening the folder menu
Activate the MP3-CD main menu
(
page 68).
Press the Folder soft key.
The names of the fo lders on the current
MP3-CD are displayed.
i
After selection, the following playback
options are displayed on the status bar.
MP3 options
i
Only folders or sub-folders which
contain MP3 tracks are displayed.