I am considering trading my Lincoln MKZ hybrid for an older (2013 or 2014) Tesla S. I've found 2 for around $25k, both have around 70k miles. What should I be looking for as far as potential problems? I assume the battery packs don't really ever go bad? Are the AC units reliable? What about the pano sunroof, do they leak? Also I'm trying to figure out what standard options are on these cars. I assumed they would have heated and cooled seats, but I don't think that's true. What about auto high beam headlights? Or adaptive cruise?