my dealer recently upgraded my tranny software too, but I have to be honest I haven't driven the X in 2.5 months it's been sitting in my garage in FLA and it was delivered to the house so I have yet to test and see if it was fixed. I'll let you know in a week when I'm back in FLA

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2006 BMW X5 4.8is Lemans Blue/Beige/Dark Maple
-Nav, Comfort Seats, Heated Steering Wheel,
Rear Airbags, AUX Input