I will take delivery of a P85 at the factory next week. Can't wait... For most manufacturers this late December manufactured car would be considered a 2014 model but that's really not how the Model S works, as far as I can figure out... Tesla is continually making tweaks to the capabilities of the car (e.g., moving the DC-DC converter recently, thus changing the dimensions of the frunk; adding the capabilities for folding mirrors which likely entailed changes to the cable bus in the doors) but the overall Model S is the same now as a year ago and will probably be essentially the same 1-2 years from now but with added features. It is more akin to revisions in electronic hardware, like my Linksys router is 'Rev B (North America)'. What is (or should be) the naming convention for the model iterations of the Model S? I would think that the Signature models are 'Rev A', and that certain subsequent ranges of VINs are Revs B, C and so on. Not having received my car yet, I haven't drilled down into the screens or on any of the badging on the door frame or VIN tag. Does anyone see any hints as to an internal Tesla revision naming scheme? I am assuming that there are certain hardware configurations that affect what version of software is downloaded and what capabilities the car has (e.g., certain levels of supercharging). IMO, Tesla would help transparency by explicitly stating that certain ranges of VINs are Revs A, B, C etc. and providing a lookup table for what was changed with each revision. Would make for much less confusion and angst about whether or not one's vehicle is 'upgradeable' or not.