I put a Pioneer AVIC-Z1 in my wife's Aviator. It looks like it came that way from the factory. I retained my steering wheel controls, VR, helluva nav system, blue tooth, XM and NavTraffic...hdd driven...the list goes on. It can easily be "set" to work while in motion too and that allows all functions going down the road...including playing a DVD. I looked at several before I bought it...it had the most bang for the buck. I've never regretted my choice.