@Guy - thanks for the helpful info
@Brian - there are two scenes, the first scene (1 person in the back and one person driving) we are still discussing how to do it, the director wants to have the cam inside the car in the position I wrote and then going out of the car without a visible cut, so we are still starting on how and wether this is possible with small budget -
the second scene is about to be shot from outside looking into the car (both person in the back) -
thanks
lars