The stereo in my C280 has recently started to pop whenever it is turned on. No matter what the volume the radio is the popping continues and will not stop. It does not pop just one time it will continue to pop about 3 times a second until the radio is turned off. Any suggestions on how to fix this would be appreciated.

if its aftermarket then check your wires you might of had left one kind of loose

Do you have a Bose system? If so, the amplifier(s) are bad. It is usually $200-$300 to repair one.