It's dealer added separate or part of one of the tech packages depending on your dealership. Got mine added since it wasn't included. I have a 16 as well, same trim.I just recently discovered that my 3rd brake light flashes when I come to a stop. I have a 2016 i Sport hatch and didnt opt for this when I bought the car, it just came with it. I think its a pretty cool feature that I havent seen a manufacturer offer from the factory. Other than like supercars.