There is a post here I read a while ago with good recovery instructions. I think kiwijochen was the author. Try searching some more. If I find the post, I will link it to this thread.

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SOLD
2000 E38 750iL Highline Edition, Upgraded with the lastest 2006 X5 Electronics
MKIV Navigation, 16:9 Display, Bluetooth, TV/Video with Backup Camera, Sirius, and Aux Input