I wonder if there is a power failure and I must get the kids strapped in car seats in the back, will the door unlock when I pull the door handle? Since the doors are unlock by pushing a button inside, that lead me to think it may be motorized lock. I am speaking about a power failure and not in a crash which Tesla said the doors would unlock in that case. What if the car is on fair and power shut down? How to I get the door open?