k , im tryin listen to my music but once i turn it up past like 20 or higher the volume turns down with out me touching anything radio volume is still past 20 and then all of a sudden jus turns back up. (note: everything is stock dvd system, navigation everything) what should i do ?

 

I forget when they started that feature, but I think they got tired of paying for busted speakers under warranty. They were crap speakers anyway and the radios were too much for them. If you want to go loud, unfortunately you'll have to go with an aftermarket system.