^Update? I have the same S639A option as you.
My iphone5 found the Bluetooth on my X5 but I don't have the passkey, nor the ULF module where it should be. Since the phone found the Bluetooth, I assume that I have ULF module. Where else could it be?

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00 E39 DINAN S1 //M5 (82k miles)
06 E53 DINAN 4.8iS, born 2/18/2006 (126k miles) http://www.xoutpost.com/bmw-sav-foru...s-my-dslr.html
90 Straman Z32 TwinTurbo Convertible, (1 of 44 ever made) 5 speed, 444rwhp/451rwtq
01 360 Novitec Spider F1 (26k miles)