I kept a spare battery in the car for my remote electronic key fob.
When neither remote worked the doors won't open. There is a secret key hole behind a panel that has to be pried open to get into the trunk that leads to a lever to open a door and then to a secret slot for the dead remote to slide into to start the car.
This car had the secret key hole unit removed or never installed. There is just an empty round hole behind the panel.
When Amazon delivers the batteries I will find out if the fault is in the remotes or not. If not, special towing is involved for a locked car in park. Perhaps technicians have a secret fix.