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Home >> Mercedes Benz >> 2011 >> C 300 4MATIC (204.081) V6-3.0L (272.948) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Radio, Stereo, and Compact Disc >> Compact Disc Player (CD) >> CD Changer >> Description and Operation

CD Changer: Description and Operation



GF82.85-P-2032CE Disk Changer Function

MODEL 204.0 /2
- with CODE (510) Audio 20 with CD changer
- with CODE (511) Audio 50 APS with DVD changer
- with CODE (512) COMAND APS with DVD changer
- with CODE (528) COMAND with DVD changer
- as of model year 2009 /YoM 08
MODEL 204.3 /9
- with CODE (510) Audio 20 with CD changer
- with CODE (512) COMAND APS with DVD changer
MODEL 204.9
- with CODE (528) COMAND with DVD changer
- with CODE (511) Audio 50 APS with DVD changer

Function requirements, general
- Circuit 30g ON

The CD/DVD changer is operated with the following components:
- Audio/COMAND control panel (A40/9)
- Audio unit buttons

Disk changer function in general
The CD/DVD changer is integrated into the audio equipment and contains a cartridge for up to six CDs or DVDs.

The CD/DVD changer enables the following function sequences to be performed:
- Load CD or DVD function sequence
- Eject CD or DVD function sequence







Shown on COMAND control unit with code (512) COMAND APS incl. DVD changer (model 204.0 as of 1.3.2011)
4 Load button
9 CD/DVD drive

Load CD or DVD function sequence
After pressing the Load button on the audio unit, the Audio/COMAND display (A40/8) shows the "Cartridge menu" including details on the last selected CD/DVD slot in the CD/DVD changer. The desired CD/ DVD slot can be selected by turning or pressing the controls on the Audio/COMAND control panel to the left or right. Selection is confirmed by pressing vertically onto the Audio/COMAND control panel.

The desired CD/DVD slot can also be directly selected using the keypad (1 to 6) on the audio unit.

A CD or DVD must not be inserted until the corresponding request to do so appears on the Audio/COMAND display, e.g. "Please insert Disc 2". After inserting the CD or DVD into the CD/DVD drive the Audio/COMAND display shows a message, e.g. "Disc 2 loading...".

The duration of the loading process can vary depending on the type of data medium involved.

Once the CD or DVD is loaded, the display changes back to the "Cartridge menu". If no CD or DVD is inserted, the display also changes after t = 20 s back to "Cartridge menu". A loaded CD or DVD is shown in the "Cartridge menu".

The "Fill up empty spaces" menu enables several CDs or DVDs to be loaded one after the other. A CD or DVD must not be inserted until the corresponding request to do so appears on the Audio/ COMAND display, e.g. "Please insert Disc 3". The audio unit then starts to load the empty CD/DVD slots.

The data exchange between the "audio unit", the Audio/COMAND display and the Audio/COMAND control panel takes place via the telematics CAN (CAN A). Video signals are sent over a low voltage differential signaling (LVDS) line to the Audio/COMAND display.

Eject CD or DVD function sequence
After pressing the Load button on the audio unit, the Audio/COMAND display shows the "Cartridge menu" including details on the last selected CD/DVD slot in the CD/DVD changer. The desired CD/DVD slot can be selected by turning or pressing the controls on the Audio/ COMAND control panel to the left or right. Selection is confirmed by pressing vertically onto the Audio/COMAND control panel. The desired CD/DVD slot can also be directly selected using the keypad (1 to 6) on the audio unit.

While the CD or DVD is ejected, a message appears in the Audio/ COMAND display (e.g. "Disk 2 being ejected ..."). As soon as the CD or DVD appears in the CD/DVD drive slot, a corresponding message is shown (e.g. "Please remove disc 2").

Once the CD or DVD is removed, the display changes back to the "Cartridge menu". If the CD or DVD is not removed, the CD or DVD is loaded again.

The "Eject all" menu enables all the loaded CDs or DVDs to be removed one after the other.

As soon as the CD or DVD appears in the CD/DVD drive slot, a corresponding message appears (e.g. "Please remove disc 3"). Once the CD or DVD is removed from the CD/DVD drive slot, the next CD or DVD is ejected until the entire CD/DVD cartridge is empty. An ejected CD or DVD is shown in the "Cartridge menu" as an empty CD/DVD slot.

The ejection procedure can be stopped at any time by pressing the load button on the "audio unit" or the "Back" button (A40/9s2) of the Audio/COMAND control panel.





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