The mileage display I am sure was working fine as other have mentioned. While your car was stopped and lost 28 miles of range, did you have anything running like climate keeper or Sentry Mode? Anything that is running uses energy which reduces miles. Keep that in mind when activating all these extra features and don't fault the car for not properly understanding how it works.The Tesla mileage display is a joke. I started with 295 miles, drove 190 miles and stopped for lunch with 50 miles left on the display. An hour later, I got in my car and the display showed 22 miles and I was only able to drive 12 miles before the battery ran dead. Tesla was going to charge me $130 for a tow. Then they canceled my service appt to fix the problem, claiming the mileage display worked perfectly. What a joke.