CD Player Mode (With Code [819] 6-Disc CD Changer)

Block diagram COMAND with CD changer, illustrated with the following equipment:

- Sound system (code 810)
- D network cellular telephone (D2B) (code 317)

The parts marked are the components most significant for CD operation

CD changer operation (with code 819)
The CD changer (A2/6) is controlled by the COMAND operating, display and control module (A40/3). The control signals and audio data are transferred from the CD changer (A2/6) via the D2B bus.

Insert only 12 cm CDs into the CD changer (A2/6); it is not permissible to use 8 cm CD adapters.

When sound system (code 810) is installed (as illustrated above), the sound system amplifier (N40/3) takes over final amplification of the audio signals. The signals are transferred between A40/3 and N40/3 as analog signals (not over D2B bus). The amplified signals are output on the vehicle loudspeaker system.

NOTE: When the vehicle is equipped with the sound system amplifier (N40/3), it is necessary to code the COMAND operating, display and control module (A40/3) accordingly with the aid of Star Diagnosis to prevent malfunctions in playback of the audio signals.

The COMAND module in combination with the CD changer (A2/6) offers the following functions:
- Scan feature
The titles on one CD or the first title of the CDs in the entire magazine are played for 8 seconds. After completely running through the titles the scan feature is terminated automatically.

- Random feature
All titles on a CD or in the entire CD magazine are played according to the random principle.

- Repeat feature
A repeat option is available for one title or one CD or the entire CD magazine.

- Fast forward/reverse (music search)
During fast forward/reverse the music can be heard so that it is possible to play or skip certain sections of a title.

CD title assignment feature
Each CD is assigned a permanently stored so-called table of contents (TOC) entry. This allows the COMAND system to clearly recognize each CD and automatically assign it a name once the user has given it a title (even when the CD is then inserted in another CD magazine).

The TOC entry also contains information on the number of titles on a CD and the total CD playing time.

CD operation with integrated CD drive
The COMAND operating, display and control module (A40/3) has an integrated CD drive which serves alternately for loading the navigation data for playing audio CDs. (It is not possible to play an audio CD during navigation operation)