So, I have been thinking harder about getting a CPO Model S while I wait for my Model 3 reservation. Since Tesla's update schedule isn't based on year (or anything else) I am trying to sort out what "year" vehicles might have the options I am looking for. I did go through the wiki linked here, but some stuff wasn't listed there (like XM radio), etc. Let me know if my assumptions here are correct. (BTW - I am looking for a "cheap" model S to drive for just 2 years, so probably a S60 with no AWD - something under $50k if I can get it) Options I am looking for: -XM radio - I believe all years had this option, but only on the upgraded sound (Studio or Ultra) -Memory seats - Maybe started in 2013?, so that eliminates 2012 models? -Heated front seats - Possibly optional on earlier models, but became standard at some point? -Power folding mirrors - I don't know when these became optional/standard -Parking sensors - Again, not sure the timeline on these -GPS navigation - part of the Tech package when that existed, maybe standard now? -back up camera - again, part of the tech package, but standard at some point So far, I think I can't get a 2012 because I THINK memory seats weren't an option then. If anyone knows year constraints for some of my other options, I would appreciate any input.