2013 Model S85 owner here. I came to discover the chargeport door not opening while the brake pedal is pressed about a year ago. I suspect this occurred after a software update because I used to open the chargeport door while pressing the brake all the time at Supercharger sites in the past. The first time the door didn't open I panicked a bit thinking, "oh no how am I going to charge the car...I don't want to have to learn how to manually release the door somehow." Lo and behold, it opened when I pressed the touchscreen while standing outside of the car. Just another one of those software changes that occurs without notification.