So I'm working on getting my '18 540i reset/restarted after a crash.
It was totaled, but the damage didn't damage the frame or the drivetrain;

The internal electronics work fine, iDrive, cluster, etc.
But the transmission doesn't light up and the car won't start, which seems to be standard behavior.
The old cars used to have a pyrotechnic disconnect for fuel/engine.

Does the G30 have anything similar, or is this all handled with the computers?
Either way, what all needs to be reset to get the car fired up again?

Thanks.