You don't. If they want to give you a ticket, you're getting a ticket. If they want to let you off, they'll let you off. If they want to drag you out of your car and beat you half to death, you're getting beaten half to death. The only thing you can possibly do is make the situation worse. Police are the violence arm of the state. You're not in control, and your rights, along with your life, depend on their whim.