There is no 100% way to say that you will 100% die with any realistic method that the average person has access to achieving. People have lived jumping from planes with no parachute when others have died falling from 2 stairs. It's all a crapshoot. Nobody here can tell you that you will for sure die, or even highly likely as the reality is with car accidents there are so many variables. Type of car, airbags, your weight, speed, what you hit (including size, density, etc), exact speed, etc. There's no method that you have complete control over is the reality. You just have to accept there's always going to be unknown variables that we don't have control over. I personally would never try to CTB by car accident, way too much chance for just maiming yourself and ending up paralyzed, with amputations, or burns all over your body. There's are things that are far worse than where you are now, trust me. There's always will be things worse than where we are now.