If you are on the compass view, the DIS will only display 'MP3'. If you go back to the "standard" DIS view, then the song title (or first 8 characters of it) is displayed.
The reason why the song title flashes when you turn off your engine is propably because the DIS switches at the same time from the compass view back to the standard view.
The reason why the song title flashes when you turn off your engine is propably because the DIS switches at the same time from the compass view back to the standard view.