The car was in deep water. How to behave and stay alive!?

As advised here .

First of all, do not panic and calm the passengers. Do not try to immediately open the door, the water pressure will not let you do it. Quietly wait until the water, seeping through the leaks of the body, fill three-quarters of the cabin and equalize the pressure inside and outside the machine.

At the same time in the upper part of the cabin under the roof there will be enough space to take a deep breath, quietly open the doors, get out and float to the surface.