2013 Model S 75k miles CPO with 18 months left on warranty. Bought her one month or so ago. Took her to the service center to upgrade to LTE and when i brought her home, the battery doesn't charge to 100%. stops at 96% I was balancing the pack so I ran it down to 1% and timed it so it would be 100% for the morning drive. Anyways now the range has gone from 252 miles at 100% to 240 miles. I called the service center and they said they upgraded my firmware and it has affected how the car calculates the battery percentage and range. At 90% i was getting 247 miles now its 220. That's pretty significant. Oh, and they told me there was an over the air fix coming. sounds like hog wash to me. any thoughts or similar experiences? Rocklin Service Center in CA.