Been to the dealer a few times to try to correct this problem: when I drive any speed with the radio at or below volume 8, the sound cuts in and out. This happens on any radio station and with any CD. The problem goes away the louder I turn it up. It seems to be worst when it's windy, hot or when I have the sunroof/windows open.

The dealer has already replaced the entire unit but the problem is still there. Anybody hear of this problem before?