Right, since you have VR covered with your SES, the TCU is perfect. If you buy a used TCU, it could have VR turned on. In that case, you could use NavCoder to disable VR. Here is a great TCU part number reference. This will help guide you to the TCUs that have Bluetooth (and VR). In your case, you could live with a slightly older TCU that has BT but not VR.

http://www.bimmerboard.com/members/p...artNumbers.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