I just put in a stereo this weekend. Normal wiring harness' and figured out out steering and reverse camera. Fits in the slot left by oem one. Only thing is the buttons on the side but not highly visible with no power to them. Will have to settle for that till a fascia comes about.
Hey Peter. I just purchased a levorg and finding the same issue. Did you find the right fascia? My levorg is a 2015 but has the same button cluster you talk about.