What should you do first if your vehicle's brakes fail completely while you are driving?

1. Turn off the engine immediately so that the loss of engine power forces the car to roll to a stop on its own.
2. Downshift to a lower gear to use engine braking, pump the brake pedal, and apply the handbrake gradually.
3. Jump out of the vehicle before it gains speed.
4. Steer the vehicle directly into the nearest solid obstacle.