My 07 X5 used to always default to FM whenever I start the car (although I was listening to my IPod/Aux the last time I turned off the car). After I complained about it at my dealer, they said they update the software now it stay with the last source of input like it should. The only remaining problem is that is occasionally start the IPod from the first song on the listing instead of the last song played.

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13 X5M