Alright so I'm new to the site so if I am posting in the wrong spot I apologize in advance. I searched the site for a couple hours and did not find anything that would help me completely. Here is my issue. I just bought a 2005 300. All I know is that it is the touring with the Boston speaker set. My problem is that the only speakers that work is the ones in the front dash. The rears do not work nor do the ones in the front door panels. I have already checked the fade on the radio. I did however read on here that the amp controls the fade and that the amp is located to the left on the steering wheel. I did find a silver looking thing that I believe is the amp. But, from feeling around on it I did not feel any nobs or anything like that. Any hints or tips or ideas of any kind would be great. Or if somebody else thinks it's something else I'd love to hear that too.