You simply cannot fight effectively from inside your car against a threat outside your car. Of course, your first option when faced with deadly force would be to drive away, but if, for whatever reason, you cant drive away, you need to get out of your car and fight. Incoming rounds will typically drop right down into the drivers seat. Outgoing rounds will not be anywhere close to accurate and the oppressive noise and pressure may disorient you. Get out and fight.
Your Car is Cover
but only if you are outside and moving around the vehicle to improve your position. If you cant drive away, get out and fight.
Poster Comment:
Drive by shootings are a bunch of Hollywood BS. Get out and fight. Cops never shoot from inside the car. They get out and use the door for cover.
The most dangerous man to any government is the man who is able to think things out... without regard to the prevailing superstitions and taboos. Almost inevitably he comes to the conclusion that the government he lives under is dishonest, insane, intolerable. ~ H. L. Mencken