ok thanks.
but, my problem is not the audiostuff. my garage did already install an fm frequence change thingi. now i can play mp3 over the radio. but the did a mistake. i have to reset the module and change some settings. the problem is, that they put that thing behind the panel, and i cant make the modifications from the front. i have to remove all of it. i dont know how and i dont have the time to wait until monday, to go back to the guy from the garage.
so, if somebody knows how to remove the panel, i can make the canges, make some photos und show you how to solve your problems with the mp3 imput.