With a MkIII, all disks V22 and later will take you to 3-1/63. So for you to go "backwards" you'll need a disk older then V22.

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Thanks for this first answer but where can I find this file????

Thanks and Regards

Hello,

From France too, I can tell you my experience :
I upgraded my MKIII from V20 to V24.1 a few months ago. I had the message Software update ... and nothing happens.
When I reboot the car, I had a blue screen like MSDOS, with the radio, the TV, the phone working, but no more gps.

I tried many things, but I finally bought a new MKIV on ebay for about 450 euros. Now I upgraded to V28 with no problems and I use a home made 2007-1 europe map with french radars.

I think you have to replace your mkIII.

The blue screen you were seeing is the OS contained within the video module, which will take over if the nav drive fails or the vehicle cannot detect it is there.

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To get the Mk3 working again, you need to insert a good OS disc.
The OS disc needs to be burnt in Mode 2.
As Mode 2 has less error correction, you must burn the disc at the slowest speed possible.

I had the same problem with my Mk3, where it stopped during a software load. No more IBus communicaiton, no more red LED flashing. I managed to eject the bad OS CD, then switched the power off, switched on again (reset) and inserted a known good OS CD. My Mk3 then was able to read the new CD, and load the new SW, and start up.

Because the Mk3 stops and has no more IBus communication, the rest of the car cannot talk to the Mk3, so the car thinks no nav is fitted.


Try restoring your Mk3 this way.

Regards, Jochen

Thanks for all answers.
JOCHEN I like your approach, therefore could you please give me all informations needed to obtain "good OS CD" and comments about MODE 2.

Thanks in advance and Regards
For all Merry Christmas.

Hello,

I still try to recover my MKIII unit and search for solutions.
I found under different pages a link and I downloaded some files V22, V23 and V24.
The problem now is that i have several files but I do not understand or Know how to proceed within these files.
As result i have :
File downloaded: v22_1_CloneCD.rar with Winrar, I got:
Folder v22_1_CloneCD files: Cover.JPG IMAGE.CCD IMAGE.img IMAGE.sub

File downloaded: v24_Nero_Img.rar with Winrar, I got:
Folder v24_Nero_Img files: BMW-Navi-24.nrg

File downloaded:BMW.Navigation.Software.Update.v23.clon ecd.zip, with Winrar I got :
BMW_v23_update_darci.ccd
BMW_v23_update_darci.cue
BMW_v23_update_darci.img
BMW_v23_update_darci.sub

I am really confuse within all these files and do not know how to proceeed.

I hope you can help me and many thanks in advance.
Regards

These files are standard CD image files. If you do not understand them please find a friend who does - they are simple to burn on to a CD

Note for a Mk3 Nav you MUST make sure the CD image is MODE2/FORM1

If you don't understand that, ask a computer friend

Hello,

Thanks for all replies.

I understand that I have to burn, as they are the whole files version by version.

Do you have any idea which software can I use to be sure for burning in MOD2/FORM1 under windows environment.
I downloaded Image BURN but did not see any mention of MOD2 FORM1!!!

Thanks in advance and Regards