I've decided on purchasing my first Tesla and looking for a Model S 2016-2017. I know that I want the later release if I buy a 2016. I'm going to look a 2016 90D that's local to me tomorrow, it's high mileage but I think I can get the price right as they've had it for a bit. Question, how do I determine what version of AP it has? Anything else I should be looking for specifically? Appreciate any assistance you can provide.