Aftermarket head units for a 2013 EL Limited. I’ve read that you can’t use your rear controls if you install one, is that true? After playing with the factory head unit I’m kinda wanting something more phone friendly. Do they make any that allow me to maintain the factory steering controls, backup cam, and rear controls? I’ve checked out crutchfield and found a couple but the loss of the rear controls and not supporting the factory backup cam has me concerned. Anyone have any luck finding something already?