Just purchased an 08 X5 4.8 with Nav and I was trying to figure out the best way to update, I have been reading a lot in the forum and learning a few things.

What is the difference between what the guy is selling at bmwnav.net and what is available in this forum?
Also when checking what version it is running, when I turn left right and press down a blue screen with Diagnonsis Applications comes up with OSD and exit. I can only select OSD or exit, if I select OSD, I do not see more devices listed, just and ECU list? Sorry, still learning!

Thanks in advance,
-mix