I was stopped at a red light when a car crashed into the back of my 1997 audi a4. this caused my car to crash into the car in front of me and that car to crash in to the car in front of it. my driver-side air bag did not deploy and my seat belt did not lock up. the air bag on the passenger side did deploy. because the air bag and seat belt did not work, i hit the windshield and had to go to the hospital for medical attention. *tr