I brought my 2014 i3 bev to a BMW dealership to get a hv battery capacity check done. I had been seeing the secret menu estimate of battery capacity bouncing around from 13.2 to 12.8 and back. They seemed to want me to phrase the request in the form of a complaint, as in "I am experiencing reduced range" Really, I'm just selling the car, and I am curious if it might qualify for warrantee replacement. They said they would do it for $169, but then came back a few days later and said the have to do a $250 software update before they could do the $169 capacity test. I read somewhere that BMW dosn't charge for the update, but that some dealerships do. Is there a zip drive I can order and do this myself?