I too have the intermittent charging problem on my M3. I ltook advantage of the local power company time tiered rates between 11:00 PM and 6 AM and set the TM3 to start charging at 11:30 PM. It worked fine from delivery on Valentines day up until I took it on its first trip up to Oregon and back two weeks ago. After I got back, the car began to intermittently charge as reported above. Specifically it would drain down about 5 to 7 miles, then start recharging. I would get 7 to 10 "recharge complete" messages during the day. My Den is above the garage where the TM3 is parked and I have the phone key turned on. I estimate the distance is about 15 feet (with a floor separating) the phone and the car. I work out of the Den a fair amount so the phone is often there. I also charge the phone in the Den at night. So, I'm thinking that perhaps the nearness of the phone is keeping the car awake. It is certainly true that if I step into the garage with my phone in my pocket, the TM3 wakes right up ( the lights come on and the rear-view windows unfold). So, I called Tesla. I was referred to the diagnostic team after the service rep talked to me about the problem. The tech suggested that I plug the car in after 11 and unplug it in the morning; so that is the current practice. In between, the first call and the call back from the service tech on the diagnostic team, the car software upgraded from 4.8 to 10.5 (nice to have five full fanny warmers and 90MPH emergency braking, but best is the touch the door handle to wake up the car.) but the intermittent charging behavior was not corrected. I got a call back day before yesterday and the Diagnostic team service tech had me check to make sure that I had indeed set the correct charge start times(I had), then soft and hard reset the car to no avail. Then he had me cold restart the car ( There is a power-down toggle in the "Safety and Security" panel ). He was monitoring the car all along and said that it was still clearly re-charging. And interestingly, that mine was the first such reporting of the intermittent failure. But it is clear people here are seeing it too. Are you all letting Tesla know about the problem? Anyway, he said he'd collected enough data so that the diagnostic team could really dig into the problem and figure out what is going on and perhaps provide a fix. He suggested that the practice of plugging in after 11PM and unplugging in the morning continue until they figure out what is going on and provide a fix. So, my evening ritual is continuing.
