i have an 04 prius without the jbl system and without the nav system. i also have a roadie radio (ithink a roadie 2) ive beentold that instead of having to use the rotten pain in the neck fm modulator that i can hook up to the prius audio in and have pretty good sound. btw i do not have the cd chager just the single builtin cd player. i am and have been using the fm modulator but of course when you drive around you eventually find another station on your modulator . real hassel. i hope ive stated my problem in an understandable way. so does my prius radio have an audio in?????