My son and my wife swapped cars this morning as she had a lot of supplies left in her old car which my son is now using. So, he goes out to start the car this morning and he can't get it started. He calls me, and I run him through all the steps of starting it figuring he was confused about stepping on the brake pedal etc. He can't get it started. My wife goes out and tries, and she can't get it to turn over and no signs of life. I was a couple of blocks away, came home, and found the car so dead that door locks wouldn't work, courtesy lights wouldn't light up, nothing. Fortunately when my son first went out, there was apparently enough power to unlock the door, so I was able to open the hood. Otherwise, how would you be able get to the battery without the hood release. I put the battery on a charger, and after about 30 minute I was able to start the car. I called and made a service appointment at my local dealer but they can't see it until next week. I drove the car all day long afterwards, and had no other problems. The car is a 2016 Black Label pretty much loaded with 7000 miles on it. I looked on the internet for any useful information, but only found one reference about a service bulletin that was related to the optional Revel sound system (which I have) on early build 2016 cars possibly draining the battery. There was an updated software solution. I checked the CARFAX service history and did not see this performed.
Has anyone else had a similar experience, and what was the diagnosis?