About Car in water — the complete escape sequence: which statement is WRONG?
Do not try to smash the windscreen, it is extra strong and therefore almost unbreakable.
If the side window fails, wait until the car has mostly sunk; then the pressure inside and outside is equal and the door opens by itself.
Swim away facing the car at first; only once at a safe distance from the vehicle do you turn around.
If your car ends up in the water, the very first thing you do is undo your seatbelt.
Explanation
trap: step 1 skipped. Book p.177 - step 1 is lights on: switch on interior and exterior lights for orientation and visibility to rescuers. Only step 2 is the seatbelt