The C180 has been suffering flat battery on more than one occasion in the past month. I have found the reason for it? My wife has a habit of driving the car with the side lights on when the weather starts getting bad. I notice this afternoon after we got out of the car that the ignition was off, key removed, sidelights on and no warning buzzer??? So what I would like to know is where is the buzzer located and how much for a replacement?