We have a couple of cars and my wife's car was having audio issues. One after another the dealer had techs look at it with out success. I heard of Audio Unlimited and Neil the owner and made an appointment. By lunch we got a call that the car was done. We have never had another issue. One by one he has upgraded each of our other vehicles. Starting with a 1935 Dodge, 68 Camaro, to our Benz. They are safe and we have the best tunes.