The head unit is in working condition and so is the cd changer. In all honesty the cd changer was used to trick the head unit so I could access the aux input for a Harman Kardon Drive & Play ipod controller in the first system built up for this car in 2006, its been out of the car for the last 6 years boxed up on the shelf in my office. I was holding on to it thinking I might go back to a stock head with the current system, but that has gone away in favor of crafting a new center stack to house an ipad as the front end for the system.

As for plug and play the only thing you will need to purchase is a Harman Becker GPS antennae which can be found on ebay for about $10-20 bucks. Once you have that its plug everything in and you are ready to go.