I have a 2004 S-Type with the basic AM-FM-CD stereo. Is it possible to add the factory CD changer to this system without a lot of fuss? Hopefully, it's a "plug-n-play" installation; just mount the changer in the trunk, plug in the already-there wiring harness, and I'm in business.

I'm guessing it's not that easy. Will it require a new head unit, additional wiring harness, etc? If it's too much trouble, I'll just wait until I get my next one, and make sure it has the better system.

Thanks,

JD