COMAND(R) - Control Head Repeatedly Ejects CD's
Date: May 2, 2006Order No.: P-B-82.85/497
Supersedes:
Group: 82
SUBJECT:
Model 215.373/374/375/376/378
Model 220.170/173/174/175/176/178/183/184
Model Year 2001 to 2003, Equipped with Bosch 2.5 COMAND
Head Unit Repeatedly Ejecting Navigation or Audio CDs/Message "Please load NAVI-CD model DX" Is Displayed on the Head Unit
If you receive customer reports in the above model vehicles (equipped with BOSCH COMAND 2.5) of the head unit repeatedly ejecting CDs, the head unit software needs to be updated using COMAND Update CD S-2786-06A. This applies to the head unit part numbers shown and software version 23/03.
In certain cases, when the user ejects the Navigation CD version 2004 or 2004/2005 from the COMAND and then inserts an Audio CD, it may occur that the COMAND keeps ejecting the CD and the following message "Please load NAVI-CD model DX" appears in the display. Turning the ignition OFF then back ON allowing the D2B and CAN buses to sleep does not remedy this issue.
Follow the steps below to update COMAND 2.5 Software
Note:
Connect a battery charger and turn ignition, COMAND Head Unit and all consumers OFF and remove the key. The software update process lasts about 50 minutes. Read over the procedure before starting to familiarize yourself with it.
1. Press "PWR" to turn ON the COMAND unit and eject navigation CD-ROM (if installed)
2. Press "PWR" to turn OFF the COMAND and wait a minimum of 15 seconds
3. Press and hold both "*" and "#" keys, while continuing to hold the keys down, turn ON COMAND by pressing the PWR button
4. Head unit will display the message - "Service Download from CD"
5. Insert update CD-ROM
Note:
Dates of the current and new software will appear, ensure that "new" software date is actually more current than the one being replaced. If not, abort the process by selecting CANCEL.
In some cases, the CD-ROM ejects itself even though the date of software is newer, just reinsert CD-ROM and continue procedure. Do not leave the update CD in the customer's vehicle.
6. Using the cursor knob, select "START HEAD UNIT" (this should already be selected by default) then press the knob again to initiate the download process.
7. When the update process is complete, the screen will display "SW-Download Successful"
8. Press the rotary knob to accept the message and complete the update process. COMAND will return to radio mode.
9. Eject the update CD-ROM and insert a Navigation CD-ROM to ensure proper operation of the COMAND.
10. Verify that all modes of COMAND are functioning normally by removing the Navigation CD and inserting an Audio CD.
Caution!
The update process lasts about 50 minutes. It is necessary for the technician to remain with the vehicle and observe the update process until completion. During this time, Do NOT: start the vehicle, operate any other vehicle systems, eject the CD or turn power OFF the unit. Any significant voltage drop in the vehicle could abort the update process. A partially completed update may render the COMAND unit inoperative. If the update procedure is interrupted, aborts or takes longer than 1 hour, remove the COMAND fuse for 30 seconds and restart procedure. DO NOT insert a navigation CD into the COMAND unit if a download via CD-ROM has not been completed successfully because you may not be able to eject the navigation CD since the COMAND unit will remain in the "download-mode".
Parts Information
Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair.
In Case of Warranty, use the table.