New EV buyer here. I put down a deposit on a used Model S today... I won't be taking delivery for a few weeks though. Its from a private dealer. I was thinking about battery degradation and I asked for a photo of the monitor showing the expected range when fully charged. He did so and I can see it is 407km. So then I looked up what the rated range for that year/version was (2015 P85D) and it was... exactly 407km. At first, I was like, "bonus, no degradation!"... but then I started to wonder how that's possible. It has over 55,000km and is over 2 years old, so shouldn't it be showing some degradation? In the ICE world, this sort of thing (if there was a proper analog for it) would have me wondering if there was some ODO manipulation going on. Is there anything to be worried or suspicious about? Or should I just be happy that the battery is going strong?