Just bought an '03 L300. The stereo has a button near the CD slot that is labled "AUX". Is this to mean that there is a way to plug my mp3 player in somehow? I cant find a wiring harness online to find out if there is a stereo mini plug or RCA inputs behind the unit.
Ant help would be appreciated!!:)

Well, this is a puzzle --

I've gone through my manuals for the '03 L-series Saturns and cannot come up with an answer to your question.

The documents I have show three different radio systems were available - a straight AM/FM radio, an AM/FM radio with CD changer, and an AM/FM radio with both a CD changer and a cassette deck. My problem is, NONE of those three OEM radios have an "AUX" button on them.

Apparently, you have an after-market radio there (brand name unknown), and as such, there would be no way I could advise you without further information -- sorry

When I purchased my L300 I was told the AUX button was for a trunk mounted CD changer, I never checked for a wiring harness.

Drosselmeyer

Almost sounds like someone put a DVD player radio in that car. By any chance, will your radio play DVDs, and is there a video screen in the back seat area ?? Such a radio (OEM type) should have the DVD logo and possibly the MP3 logo on the front panel near the upper right corner