At the top of the forum page is a link called "Online WDS." That is the BMW X5 wiring diagram. Also on the X5 home page, there is a post under the Stereo section with the radio and amp wiring detail. Here's a link.

http://www.xoutpost.com/articles/x5/s...formation.html

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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