I tinted all my windows the passenger side and the driver side including the all back windows. I knew that by doing this I would interrupt my radio signals. I can open/lock the car with the remote, but have to be very close to it. I love this car and I like it better with my windows tinted it makes the car look even more sporty. I have looked into getting an antenna amplifier installed on my front windshield, but I was told that presently there isn't an adapter for the stock radios. Does anyone know more about this? I hope I am not the only one that has tinted their C230 windows and is having radio signal reception problems. If this can't be solved, I will keep my stock radio to control my CD-changer and I am thinking to add satellite radio receiver, in the open slot bellow.