The steering wheel buttons are standard, so they won't tell us much. The pairing button would normally indicate a ULF Bluetooth module. Do you have the "TELEPHONE" option on the main menu. That will tell you if a ULF or TCU module is instaled in the car.

Also, if you push and hold the "sneezing man" button or the center console pairing, what happens? If you briefly push and release the same two buttons, what happens?

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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