2005 MERCEDES-BENZ SLK-Class Comand Manual

56 AudioMP3 operationSafety InstructionsWarning
G
In order to avoid distraction which could
lead to an accident, the driver should insert
CDs with the vehicle at a standstill and oper-
ate the audio system only when road, weath-
er and traffic conditions permit.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h), your vehicle is
covering a distance of 44 feet (approximate-
ly 14 m) every second.
Warning
G
The CD drive is a Class 1 laser product.
There is a danger of invisible laser radiation
when you open or damage the cover.
Do not remove the cover. The CD drive does
not contain any parts serviceable by the us-
er. For safety reasons, have any necessary
service work performed by qualified person-
nel.Tips on data storage media!Do not attach labels of any type to the
CD. They may become detached and
damage the drive.
!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.
If you insert thicker data carriers, e.g.
ones that have data on both sides (one
side with DVD data, the other side with
audio data), they cannot be ejected
and will damage the drive.
Do not play single-CDs (80 mm) with an
adapter. Only use 12 cm diameter CDs.

57 Audio
MP3 operation

Only touch the CD on the edges.

Clean the CD with a dry, lint-free cloth.
Wipe the CD a straight line from the
center. Never wipe the CD in a circular
motion.

Do not use rubbing alcohol or solvents
to clean CDs.

Do not expose the CDs to heat or direct
sunlight.

Do not write or put labels on CDsPermissible MP3 CDs
In MP3 mode COMAND can read CD-R and
CD-RW CDs.
Permissible file systems
The permitted file system is
ISO9660/Joliet for CD-R and CD-RW.
Multi session CDs
With multi session CDs, the content of the
first session determines how COMAND
treats the CD. Tips on caring for your MP3 CDs
Tips on creating MP3 CDs iCDs, software and hardware for writing
audio data to CDs are widely available.
Therefore, we cannot guarantee that
COMAND will be able to play every
user-written CD.
Problems may be encountered during
playback of user-written CDs with a
storage capacity of more than 700 MB.
These CDs do not meet valid standards
as of this printing.

58 AudioMP3 operationFor 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 conven-
tional audio CD.
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.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.mp3
In the example, the track name con-
tains six characters, followed by a peri-
od and the file extension “mp3”.
Empty folders or folders containing data
other than MP3 tracks will not be dis-
played by COMAND.

59 Audio
MP3 operation
If MP3 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.
Permissible MP3 formats
COMAND supports the MPEG1
Audio Layer 3 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 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.
iCOMAND does not support ID3 tags.Tips on creating MP3 tracks iIn everyday speech, this format has
been replaced by the designation
“MP3”.
iIt is recommended to use MP3 tracks
with a bit rate of128 kbps or higher and
with a scan rate of 44.1 kHz or higher.
Lower rates may impair quality. This is
particularly true if the sound function LOGIC7 Surround
has been activated.
Tips on copyright

60 AudioMP3 operation
Open the MP3 main menu (
page 61);
or

Load an MP3 CD into the COMAND CD
drive.
The COMAND CD drive holds one CD. Lo-
cated above the display is the CD slot 3
for loading the drive (
page 16).

Insert a MP3 CD face up into the CD
slot while COMAND is switched ON.
COMAND pulls in the CD and loads the
data. It may take a while to load the da-
ta, depending on the number of folders
and tracks.
After loading, COMAND plays the CD.
Switching to MP3 mode iMP3 CDs can only be played back in
the COMAND CD drive.
Loading a MP3 CDWarning
G
In order to avoid distraction which could
lead to an accident, the driver should insert
CDs with the vehicle at a standstill and oper-
ate the audio system only when road, weath-
er and traffic conditions permit.
Bear in mind that at a speed of just 30 mph
(approximately 50 km/h), your vehicle is
covering a distance of 44 feet (approximate-
ly 14 m) every second.
!If a CD is already loaded, it must be
ejected before inserting the new CD.
Inserting a second CD in the slot with
another CD still loaded will cause dam-
age to the CD drive not covered by the
Mercedes-Benz Limited Warranty.

61 Audio
MP3 operation

Press7.
COMAND ejects the CD.

Remove the CD from the slot.
If you do not remove the CD from the
slot, COMAND will automatically pull it
back after approx. 7 seconds.

Open the Audio main menu
(page 38).

Press the
MP3
soft key.
COMAND loads the MP3 CD data. This
may take a while depending on the
number of folders and tracks.The MP3 main menu appears. You will
hear the last track played.
1Current folder
2Current track
3Elapsed track time
4Track number within the current fold-
er/number of tracks in current folder
Ejecting a MP3 CD MP3 main menu
iThe
MP3
soft key will only appear if an
MP3 CD has been loaded.

62 AudioMP3 operationIf the MP3 tracks are organized into folders
on the CD, you can select a folder from the
COMAND control unit.
The following options are available:
Selecting via folder list

Selecting via extended folder listSelecting via folder list
Only one folder can be viewed at a time.
1Current folder

Open the MP3 main menu (
page 61);

Press or  to select a folder.

Wait approx. 3 seconds without chang-
ing the selection.
The COMAND changes the folder and
loads the data from the new folder.
It may take a while to load the data, de-
pending on the number of folders and
tracks.
Selecting via extended folder list
iOn MP3 tracks with variable bit rates,
the elapsed track time displayed may
deviate from the actual time elapsed.Selecting folders
iThe folder list only contains folders in
which MP3 tracks are stored.
iThe extended folder list only contains
folders in which MP3 tracks are stored.

63 Audio
MP3 operation

In the MP3 main menu (
page 61),
press the
Folder
soft key.
The extended folder list appears.

Press or  to select a folder.

Press.
COMAND changes the folder and loads
the data from the new folder.
It may take a while to load the data, de-
pending on the number of folders and
tracks.The following options are available:

Selecting via track skip

Selecting via track list (
page 64)

Selecting via direct entry of the track
number (
page 64)

Selecting via scan search (
page 65)
Selecting via track skip On the COMAND control unit

Open the MP3 main menu (
page 61).
Selecting a track iForward skipping:
The next track is played.
iBackward skipping:
If the track has been playing longer
than approx. 10 seconds, the system
skips back to the beginning of the
track.
If less than 10 seconds have played,
the system skips back to the beginning
of the previous track.