I want a touchscreen nav head unit for my 2015 i can get one from a 2017 g4 on ebay for 125$ just wondering will this fit into my 2015 as long as i get harnesses and wires and all that? And also will it work with steering wheel controls i may just pay best buy to install it so it looks factory unless someone here is near me and wants to to make some dough as im not mechanically inclined