You could print and hand them this BMW Technical Service Bulletin document. And, then ask them to perform that update under warranty. (Just make sure they do the current update. This printout is for a prior version.)

http://www.xoutpost.com/pdf/v28.pdf

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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