I'm looking to update the HU with CP/AA just so that I can update the car tech to the latest and greatest. Currently it's fitted with the factory "big screen" navi so I'm keen to update accordingly. I'm not fussed if I lose auto parking just to get CP/AA but I won't be selling my current head unit anyway. Ultimately I'm keen to keep the reverse camera dynamic guidelines which from my research no aftermarket unit supports. Looking at videos taking the 230mm wide head unit taken out of the car, it appears from the side it could work and fit OK with the exception of covering the back should the unit stick out from the top. Has anyone looked into this at all?