Hi everyone, I was hoping I could get some help from you guys as I'm looking at buying a Model S. I didn't see anything posted in this section. Anyway, I've always had a rule against buying a brand new car, and while I'm more willing to buy a new Tesla than a new ICE, I'd still rather look at used stuff. Currently, I know there are some major differences between cars made before September(?) 2014 and after. The hardware to make autopilot work was installed in new cars after that point and I've read about some of the new features here (Please login to see links and more information.), but I'm not sure what other changes there may be in different model years. Thanks in advance!