Robin Williams stars in this oddball comedy about a fast-talking car salesman who is down on his luck and in over his head until an extreme situation forces him to use his sales skills to save lives. Joey O'Brien (Williams) is the stereotypical car salesman: enterprising, aggressive, and desperate to make enough money to spend on his high-maintenance girlfriends. But suddenly the pressure is really on: he owes money to the mob, his ex-wife is nagging him about not spending enough time with their teenage daughter, and if he doesn't sell at least a dozen cars by the time the big sale is over on Saturday, he's going to lose his job. As Joey attempts to placate several potential buyers, his day is interrupted by Larry (Tim Robbins), the insanely jealous husband of dimwitted showroom receptionist Donna (Annabella Sciorra), who's been having an affair with someone who works at the dealership. With the police surrounding the place, his job (and life) on the line, Joey realizes that it's up to him to use his wits to persuade Larry -- who's not even sure what he wants out of the situation -- not to kill anyone.~Don Kaye
Car salesman Joey O'Brian's life is very complicated in this fast paced movie. With an ex-wife, a stable of women, a doting Mother and pressure from work and a mob boss, how could things get worse? Enter Tim Robbins as an out of work loser with "Plastique" explosives strapped to his motorcycle, who's wife is having an affair with someone at Joey's work, a Cadillac dealership in NYC. Joey (Robin Williams) uses his salesman skills to make everything come out just fine! I love the relationship between the Police Captain and the owner of the restaurant the police use as a command post. Great movie, just don't blink or you'll miss the action!
This review is from Cadillac Man [DVD] 
I would recommend this to a friend
Rated 1 out of 5 stars
"Cadillac Man" bottoms out
I wouln't consider this a comedy even by a streach of the imagination. There are comedic moments, but not enough to blot out the "R" rating. I wouldn't pay a dime to see it again. In fact, I want those two hours of my life back.