I've had this happen twice in 3 years of ownership ('08 3.0) but each time, turning it off and back on resolved it. I didn't bother mentioning it to the dealer cause I'm sure they can't duplicate it since it's rare/random.

As for battery issues, I've had that twice as well but not at the same times. Electronic gremlins?

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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