I was thinking about ordering a cd changer from car-part.com, but how hard would it be to install in my E320? I'm assuming it has to go in the trunk.. I don't believe the car ever came with one. I'm a dealer, so I really don't know.. I don't see any wires from just lifting up the carpet in the back,. So would this mean I could have to run a wire to the trunk?

Please inform..