If you have a cassette player, try this: http://www.target.com/gp/detail.html/185-8657064-9081316?ASIN=B00005T39Y&AFID=Froogle&LNM=B00005T39Y|Sony_MiniDisc_and_Discman_Car_Cassette_Adapter_-_CPA-9C&ci_src=14110944&ci_sku=B00005T39Y&ref=tgt_adv_XSG10001
That's what I use and it works great, but I drive a '98 haha.
I've also had an iTrip for my iPod mini way back in the day, and I had terrible sound quality-- a lot of static. But that might be your only option. Try reading some reviews of one before you buy it. Good luck!