Radio Problem (ping)
 

The radio on my 2006 9-3 aero has a ping noise in the background. On the FM side I get th ping but I can also hear the radio to. On the AM side it is pure garbage. I took it to the dealer and they said it is because of my tint and told me to go pound sand. I don't think it is my tint because sometimes the ping goes away and I get great radio reception. Any suggestions???