I was driving my '09 on Wed for probably 2 hrs or more. I was playing the ipod & loading a couple of cd's onto the hdd at the same time. Anyways, got to a destination parked. When I came out the radio was working normally but the display looked bleached out with fine horizontal lines across it. I tried recycling the key but it didn't help. It stayed that way for quite some time. Got home, parked it in the garage. Went out a while later to check it & the display was fine again. I was wondering if it was a heat issue. Any thoughts?