So I am pretty bewildered, concerned and a little bit upset about what happened to my S a couple of days ago. First, I got a 12 V battery warning and so took it in for service at the Buena Park facility in So Cal. I got the car back the same day after they replaced the 12 V battery and did a general inspection which revealed nothing else wrong. I drove it from the Service center (about 20 miles) and parked it in a hospital parking garage. When I came back 2 hours later, the car was DEAD! You could not open or wake the car with the key fob, Android app, 24-hr roadside assistance which tried to remote into the car. They sent a tow truck who broke in through the driver side door, but to no avail. The car is UNRESPONSIVE! Flat lining! The car had to be towed back to Buena Park the next morning. After a couple of days the service manager called me and told me that the main battery pack had completely discharged. They charged it again and it did the same thing again. Apparently, there is some problem with the high voltage junction box controlling in the battery pack. So now the battery pack with be removed and sent to Fremont for analysis and I will get a loaner battery pack in the interim. Has anyone heard of this happening? And if so, how should I deal with Tesla? What guarantee is there that this won't happen again when the warranty runs out? I am so shaken up by this incident, that I almost feel like I got a lemon!