I'm having trouble with my factory phone kit in my leon sport, my car connects to the bluetooth every time I jump in, but i don't hear that little "ding" sound I used to hear you know when the car connects to the phone, and when I make a call I can't hear anyone talk, so I'm guessing its the tweeters because someone told me the factory car kit works through the tweeters, any ideas what it could be? fuse gone or anything like that?