Are you using the pairing button in the center console? Did you let go of the button after waiting for the 3 seconds? The pairing message ususally goes on right after you let go of the button. Check your power connections and fuses also.

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'06 X5 4.8is, TiAg/black, cold weather pkg., comfort seats
'07 750Li, TiAg/black, sport pkg.
'05 Ford F350 silver met./slate gray, Lariat, 6.0 PSD, CC, DRW, FX4