Not disputing whether it had a part number; tools do, too. Main point is, at the time I researched it, several folks had queried through various parts departments and were told no such thing existed (I was one of them). One contributor pointed out that it was provided to service departments as a "tool" and gave me the part number. I checked again with the parts manager at my dealership, and indeed, he found that the service department could order it as a "tool" (through him, no less) - but that it wasn't listed in the "parts" catalog. The service manager was willing to order it for me - but not cooperative about flashing the update. Probably for the reason below.
I searched using "COMAND Software" and came up with a ton of posts - the best was US Comand 2.0 Firmware Update - MBWorld.org Forums
. Apparently some U.S. COMANDS for model year '00 cannot be updated (according to some contributors; I can't verify); and later COMANDS that should be updatable may have faulty "bootloaders" that prevent updates. Trying to flash a COMAND with a faulty bootloader apparently disables it completely. I did not come across the post I mentioned above, where a kind soul gave me the part number for the update.
As an aside, I have a recollection of one person in India who developed a procedure to repair a COMAND bootloader and wrote it up, but I did not come across it. Bet a search of "Bootloader" would get it.
Also, a number of contributors reported that the Euro COMAND firmware update is not compatible with U.S. COMANDS. I did glean from those writeups that when a COMAND is not compatible with an update (not just the Euro update), it rejects the update disc when you insert it on the prompt. That would lead me to believe this would happen in a non-updateable COMAND, as well.
Unfortunately I was not able to get any information on which models or dates of manufacture of COMANDS might have been updateable or not. I was interested because it has always been an unanswered question why, when my '00 COMAND was flashed with some kind of update for an audio problem, the nav system was rendered unuseable - it kept rejecting discs, as you described - requiring replacement of the COMAND unit. My dealer at the time said this was a frequent occurrence, and claimed the MB would replace the COMAND again only if MB directed flashing the unit - not if I directed it.
Because my wish for the update was for appearance' sake (I wanted the MB logo, not the verbal warning, on startup) and to try to cure one minor problem accessing the CD screen by voice control (recall that I had installed an '01 voice control with my '00 COMAND), I didn't pursue it (there was an easy workaround to access the CD controls by voice: manually select CD, then all worked properly). Not enough to justify the cost af a COMAND replacement. As I best recall, the disc I was after was dated sometime in '02.
What struck me in the string was that apparently you were able to do an update of your '00, although you had some problems after - which seem to have cured thenmselves. What you described resembled the problem I had after the dealer tried the update of my COMAND - but I never gave it the time you did after the problem appeared. I took the car back to the dealer immediately - never left the block he was on. He couldn't resolve it either, and replaced the whole unit (under warranty). Now I am just wondering, for curiosity only, whether it was necessary.
I also wondered if waiting as you did helped FL2002E55? Or perhaps, if trying a flash of his unit with the update you used would help?