I believe this movie is from the early 80’s. All I remember is that they are trying to kill a man who is in a bullet proof limousine. In order to get him to roll down the window, the hitman drives along side the limo in a convertible with a blowup doll in the front seat to make it appear as if he’s having sex while driving. The target rolls down the window to get a better look and the hitman is then able to shoot him.
No, that’s not the one. But thank you for your suggestion. It wasn’t a comedy. They were on the highway and the hitman with the blow up doll was in a convertible driving next to a limousine with tinted windows.