I'd like to take this opportunity to thank you and the whole forum. I just bought a 2002 X5 and, after reading here, decided to upgrade my MkIII nav which was at 3-1/40. After burning the disk & putting it in, I got a blank screen and continuous reboots, which I let run for half an hour. I did everything you're not supposed to do - I ejected the disk, I removed power, and I thought I had killed my nav unit, along with any display for the radio, OBC, etc. I was beside myself - but I checked back through the old posts.

Following the advice I found there, I checked the disk and it had been written in Mode 1 for some reason. I burned another making sure it was Mode 2/Form 1, and my nav came back to life, fully up to date 3-1/63 and working flawlessly.

Thank you!