There's really no way to get into the vehicle from the outside if the battery is dead? I find that hard to believe...
...okay, looks like there is a way but it's really convoluted and you need to basically jump-start the low voltage system (using either an ICE car or a battery pack). https://www.tesla.com/ownersmanual/model3/en_us/GUID-3567D5F... That's really, really dumb.
I believe it's legal because rear doors have child safety locks so often can't be opened from the inside anyway. Although that doesn't cover opening it from the outside...
...okay, looks like there is a way but it's really convoluted and you need to basically jump-start the low voltage system (using either an ICE car or a battery pack). https://www.tesla.com/ownersmanual/model3/en_us/GUID-3567D5F... That's really, really dumb.