I had an 08 Challenger for a short time before the engine blew up due to the dealer not fixing something properly. There was no amplifier in it.
I've found more and more that some dealers don't know what they are talking about. Like when the dealer treated me like a moron when I just got the Speedster 200 last weekend. Our conversation went like this...
Me: "I have a Speedster 200 that I just picked up and I can't find the hour meter, do you know where it it?
Him: "uh, where you'd expect it to be, on the dash."
Me: "It's not there, I checked everything, even in the engine compartment"
Him: "well you need to hit the mode button to display it."
Me: "I said this is a 2008 Speedster 200"
Him: "yeah and your point?"
Me: "It doesn't have anything digital on the dash."
Him: "Well I guess I can't help you then."
I'm done with that dealer.