The best position is for the man to sit in the passenger side and the woman sitting on him as she faces the front. That way, lover boy enters from the rear. This position is better done with her legs tucked inside of his, so that the woman controls the penetration and rhythm.
#2:. Backseat driver
Let the man sit behind the passenger seat and push it forward to create leg room. The woman can now settle on his erect manhood, facing the front. She can assume a kneeling or bending position as her legs are planted outside his hips. This way, the man can lie back while the woman drives the thrusting.