CD player with changer, function - GF82.64-P-3113-02B
Models 208, 210, 215, 220
CD player control
Dependent on the vehicle equipment specification the CD player with changer (in trunk) (A2/6) is controlled via the Digital Data Bus (D2B), by the
- Radio (A2) or the
- COMAND operating, display and control module (A40/3n1)
The CD player generates reports on the following operating conditions:
- No magazine in CD changer
- Magazine occupation (music CDs only)
- Number of current CD
- Number of current title
- List of occupied slots (CDs)
- Number of titles per CD
- Current operating status (play, pause, etc.)
The messages are sent to the D2B and interpreted by the radio (A2) or the COMAND operating, display and control module (A40/3n1) .
CD playback
The audio data is digitally stored on the CD ROM. The audio CD is driven by a motor in the CD player. The laser-optical device scans the side of the rotating CD with no label without touching it and converts the digital-optical signals into electric signals. Small interruptions to the data flow to the laser optics, caused by scratches or contamination on the audio CD, are subsequently interpolated by the DA converter and thus compensated for. The electric signals in the CD changer are then decoded and transmitted via the D2B, depending upon the vehicle's equipment specification, to the COMAND operating, display and control module (A40/3n1) , the radio (A2) or the sound amplifier (A2/13) .
Jumps and interruptions during playback
When driving on poor roads and during hefty vibrations it may be that jumps and interruptions occur during playback. In such cases CD playback should be put on hold until the condition of the road improves.
In the wet or where ambient temperatures fluctuate wildly the CD changer housing may experience a build up in its humidity level (condensation formation). This may also lead to faults occurring during playback.
Where this happens take steps to ensure that sufficient ventilation is provided for the CD player in the trunk.