Is there a safe way to do this with an original OEM car stereo head unit? Has anyone been able to setup a auxiliary input that connects a mp3 player to the head unit without sacrificing safety and the original head unit functions (external dashboard with time / mileage, rds info, CD playback time etc). Car manufacturer doesn's offer any solutions for this. I think this may be possible by finding the audio connections for the CD changer in he back of the head unit and somehow connect a cable (which one?DIN cable?) and trick the head unit into thinking that the mp3 player is in fact a CD changer... Long shot?Maybe. I don't have the technical expertise to do this on my own, but I'm willing to try this when I find the right car audio specialist. In the meantime, do you guys know any kit, non-do-it-yourself or alternative solution to make this possible? (I'm not that interested in fm transmitter solutions) Any comments/help appreciated. Thanks.