If that is the case, have you tried the Xoutpost post I mentioned.

I also found this one.
orums.bimmerforums.com/forum/showthread.php?1760741-2005-X5-Pairing-April-05-build-date-R-T-button

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas