CD player with changer, function - GF82.64-P-3113-02PM

Controlling CD player 

The CD player with changer (in glove compartment) (A2/6) is controlled by the following components via Media Oriented System Transport (MOST) depending on the vehicle equipment:

• Radio (A2)
• Radio and navigation unit (A2/56)
• COMAND operating, display and control unit (A40/3)

The CD player with changer (in glove compartment) (A2/6) generates messages on various operating conditions and forwards them via the MOST to the control unit installed depending on the equipment variant. The following are part of the operating conditions generated by the CD player with changer (in glove compartment) (A2/6):

• No magazine in CD changer
• Magazine occupation (only with audio CDs)
• Number of current CD
• Number of current title
• List of occupied slots (CDs)
• Track number per disk
• Current operating state (playback, pause, etc.)

CD playback 

The audio data is stored digitally on the CD. In the CD player with changer (in glove compartment) (A2/6) the audio CD is driven by a motor. 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 Media Oriented System Transport (MOST), depending upon the vehicle equipment, to the COMAND operating, display and control unit (A40/3), the radio (A2) or the sound amplifier (A2/13).