Agreeing with a bunch above, angle on the car trompe l'oeil is off and the car should be wrapped as that's what you're advertising. Right now you're just advertising an expensive car.
The tag line (Design & Graphics) does need more contrast, especially on the truck. Don't like the half-wrap effect on the truck (the white tribal graphic and white top), should have carried the design through from the trailer. Looks unfinished or like an afterthought.
Otherwise, better than a lot of shop trucks as the main point is simple and large, not over complicated with lists of services and other bollocks.