THE GUT'S IN THE MERC IS FLAWLESS NOW RIPS OR ANYTHING, JUST NEED TO BE CLEANED.I HAVE A 7" DOUBLE DIN TOUCH SCREEN CD/DVD PLAYER WITH NO NAVI RIGHT NOW. THINKING ABOUT PUTTING TO MONITOR'S IN THE HEADREST FOR MY SON OR A 24" FLIP DOWN FOR HIM IN THERE, HAVE NOT MADE UP MY MIND YET. My old speaker system 2 L7 15's. They went hard in the merc but I wanted to change it up on these dudes. They said what I wanted to do was not gonna fit but guess what, it's in there!!!