Tried again while fully prepaired to pair my wife's phone instead but the XV6800 bluetooth is working fine again. I think a full power on/off of the phone did it... seems to take care of battery-consumption gremlins once in a while too. Damn buggy windows products. When in doubt, reboot. Don't think it's the car but time will tell.

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'08 X5 3.0si - Alpine White / Saddle Brown interior
Specs: Sport Pkg, Premium Pkg, Tech Pkg, Comfort Access, Aero Kit, Style 433 staggered 20s on Conti DWS
Mods: Carbon 35 tint, LED angel eyes, GP Thunder 7500k fogs, H&R 20mm/25mm spacers, clear reflectors, gunsmoke-tinted taillights
Coded: Digital speedo, windows/sunroof/tailgate close via keyfob

X5 pics at Flickr