I'd guess that all you need to do is check out both of our devices and ascertain what in/out sockets you have.
If your car set does not have and sockets or auxilliaries you might be stuck.
Places like Maplins (UK) have a myriad of cables etc.
A colleague of mine only has a cassette and not a CD player in his car. He was able to buy a cable which plugs one end into his portable CD player, and the other into an actual cassette. He then plays his CDs through his portable player.