Thanks Qsilver7 for this info!! I have an '06 X5 and have been searching all day for the harness and low and behold I already have the factory BT set up!! I feel like such an idiot! I have an 11.10.2005 TCU and it paired automatically just as you described. I got the PK off the TCU and I'm good to go!

PropellerHead.....looks like 10/4 production date is when this started!