I am thinking that I could probably us the stock faceplate. I would not need to use my radio for HVAC, just like my F-150. This may be an easier install since all I would have to do is connect the Maestro just like I did for my truck. 12V guy could answer my question. I have been to their website and it has the option for OEM Nav equipped cars and my steering wheel.
2012 GT Premium: Nav, comfort pkg, security, Air Raid CAI, Rousch axleback, Enkei wheels