2007 MERCEDES-BENZ SL-Class audio

62 Audio
CD operation
Explanation of the playback modes
Normal Sequence
Tracks are played in ascending order
(e.g. 1, 2, 3 and so on). If just one CD is
inserted, the first track is played when
the last one is over.
If more than one CD is available, the
first track of the next CD is played
when the last track of the previous CD
is over. The CDs are changed in normal
order.
Track Mix
Tracks are played in random order. If
more than one CD is available, the next
available CD is played when the current
CD is over. The CDs are changed in
normal order.
CD Mix (CD changer only)
At least 4 tracks of any CD are played
in random order. Then follows the next
available CD. The CDs are changed in
random order.
Repeat Track
The system repeats the current track
until you switch the function off.
Repeat CD (CD changer only)
The system repeats the current CD
until you switch the function off.

63 Audio
MP3-CD operation

MP3-CD operation
General Information
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.
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.
WarningG
The CD drive and CD changer are Class 1 la-
ser products. There is a danger of invisible
laser radiation when you open or damage
the cover.
Do not remove the cover. The CD drive and
the CD changer do not contain any parts
which can be serviced by the user. For safe-
ty reasons, have any necessary service work
performed by qualified personnel.
!
Your CD drive has been designed to
play CDs which correspond to the IEC
60908 standard. Therefore only CDs
not exceeding a thickness of 1.3 mm
can be used.
The smallest possible data rate for
MP3-CDs is 56 kB/s.
The COMAND does not play back
MP3-CDs containing files with ISO
9660 Level 3 standard. Such MP3 CDs
contain fragmented files.

64 Audio
MP3-CD operation
Treat MP3-CDs with care to prevent
malfunctions during playback.
Do not scratch, touch or soil your MP3-
CDs.
Do not attach labels to or write on your
MP3-CDs.
From time to time, clean your MP3-CDs
with a commercially available cleaning
cloth. Never wipe circularly, but in a
straight line from inside to outside.
After use, put your MP3-CDs into the
CD box.
Protect your MP3-CDs from high
temperatures and direct sunlight.Permissible MP3 CDs
In MP3 mode COMAND can read
CD-R and CD-RW
CD+R and CD+RW
DVD+R and DVD+RW
DVD-R and DVD-RW
Permissible file systems
The permitted file system for COMAND is
ISO9660/Joliet for CD media and UDF for
DVD media.
Multi session CDs
With multisession CDs, the content of the
first session determines how COMAND
treats the CD.
For example, if the first session contains
data in audio CD format and the second
session contains data in MP3 format,
COMAND will treat the CD as a
conventional audio CD.
Tips on caring for your MP3-CDsTips on creating MP3 CDs
i
CDs, software and hardware for writing
audio data to CDs vary widely.
Therefore, we cannot guarantee that
COMAND will be able to play every
user-written CD. Problems may also be
encountered during playback of user-
written CDs with a storage capacity of
more than 700 MB.

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, the 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 kHzThe 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 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.
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 driveLoading 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
1Current track/number of tracks on the
current MP3-CD
2Elapsed playback time 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.