you cant have a direct plug into that sony, unless you have a cd changer port. there are some good fm modulators on the market that are compatible with every headunit, and im not talking griffin itrips. but they are a wee expensive, as someone else said the sony gt100 has an aux in port and thats not bad at £80, on the sony gt210 at £99. ask me anything on fitting ipods or system installs, deal with them day in day out