You will also need the trunk-mounted board monitor radio module. Make sure to get one of the "New Generation" flat pin radio modules that is 2003 or newer. The reason is that the harness from a 2004 MY car has the newer style flat pin radio plug.

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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