Interesting. I'm sure it's by design (i.e., it's probably not a bug), but you have a point.

If you take it out of the car then put it back into the car, it remembers that it was on the radio and will start up in that mode again.

But if you fire it up at home, it deliberately switches to MP3 playback (no radio available in home mode), and it then remembers that it was playing MP3s on its last boot.

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Tony Fabris