As a new owner, I've found at times when I start the car, I hear a fast "clicking" sound from the radio, very fast, and it last's for about 5 seconds. I have a CD in, and the radio says Chrysler, but I dont know if the unit is on, maybe. It's no big deal, but why does it come on now and then. The radio/cd works fine,but I think its a POS, any thoughts?