Hi, new to the forum, thanks for making this available. I recently purchase a 2004 x5 4.4. Couple of weeks ago the sound from the radio stopped, then it came back on. Last week it stopped producing sound on Tuesday and hasnt worked since. The radio itself is working, just no sound. I have tried replacing all 3 fuses and still nothing. It does have DSP, but when I press the button for it, nothing happens. Any suggestions?