Try googling on I-pod FM
A friend of mine ordered these on the web, its a small FM transmitter that will send the I-pod output to your car radio. costs about 30€
One end plugs in the cigarette lighter (power for the transmittor but also constantly charges your I- pod) the other connector fits in your I-pod.
Find an "empty" FM frequency on your car radio, dail this frequency in your I-pod radio and presto!!!
Used in my M5T for 4 months and took it on holliday in the rental car, then had it stolen from my loan car as the M5T was under service
Only downside can be finding an "empty" frequency to transmit on if you are in the neighbourhood of a lot of stations.