All, I recently moved from my beloved 2004 Lincoln Navigator to a 2007 Lincoln Navigator Ultimate with all bell and whistles. I want to add a rear view camera and leave the OEM radio because I don't want to lose the functionality in the back. Now the question. Have any of you found a solution to this? The other question have any of you installed an aftermarket radio or one of the chinese android head units and kept the rear entertainment system? If you did what adapter did you use? I'll be grateful for any input I can get.