About Car in water — the complete escape sequence: which statements are correct? (multiple answers possible)
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.
If your car ends up in the water, you always wait until it has sunk completely before trying anything.
Once you have escaped from the car, you had best stay in the water right by the car so the rescuers find you quickly.
Step 1 is lights on: switch on interior and exterior lights for orientation and visibility to rescuers.
Explanation
The book makes waiting conditional: only if the side window does not work. Trying to open or break it first is step 3, not waiting straight away (Book p.177-179).