Thought I'd share this with you. I was disappointed that my 2006 did not have a jack for my mp3 player. A friend told me about this - an mp3 converter. I bought one for $10 here, and it works great in my car!! http://www.carccessory.com/ You just plug your mp3 player into it, set it to a frequency unused by stations in your area; then turn your fm radio to that frequency and it plays right through your speakers. My apologies to you techie folk who know all about it; but it might be a help to other mp3/electronics novices, such as myself.
It's called an FM transmitter and it is the cheapest option out there. My advice is NOT to choose a commonly used frequency otherwise if you and the person in the next car happen to be on the same frequency, the results can be quite comical. It happened to a friend of mine.