So, as the thread title implies, I want to have aux and bluetooth added to my 92 SC400 without replacing the head unit. I have seen people use the parrot system and wire up a harness to make it work with the head unit but I would prefer to keep the head unit and not add any extra stuff sticking out, would anyone know of anyone who has done something like this? I'm looking into the wiring for the CD player on the stock head unit and seeing if there is any way I can make a secondary bluetooth system run when you switch over to CD mode. I know they make tape adapters but my tape function doesn't work. Any ideas or places where it's already been done that I may have missed?