Hi all. Looking for some help regarding the presence of 20 mp3 tracks on my Fiesta 2013 Zetec. When I press the M button on the steering wheel, I can select radio, line in and mp3. When mp3 is selected 20 tracks play in sequence lasting approximately an hour. I have never connected any MP3 device to this car and have never loaded a cd with mp3 tracks. So my question is, "where are they coming from?" Did ford load them into memory at the factory or is there some other explanation? I can't find any reference in the manual. Can anyone throw any light on this?