My S is at the service center. I had a problem in August with supercharging (Would not take a charge) so I made an appt. and 2 months was the earliest I could get. So my car has been at the SC since Friday morning and it took the weekend to find the issue. Received a voicemail call today and the problem was the "on-board charger" which is on order and should be replaced by Wednesday. Not a firmware issue. I am confused though as my understanding is the on board charger is used only with 110v, 14-50 charging etc........ The supercharger is it's own charger and bypasses the on board charger, right? I was wondering if anyone else had this problem. I could not find a thread with this info. My normal everyday plug-in worked just fine. It was only a supercharger problem.