The idea of 100% financing in any van scares the bejeebers out of me. If you're that hard up, the first breakdown in a Sprinter will do you in. Those things are Mercedes-Benz regardless of what the nameplate says, and when something breaks you'll pay M-B prices. Even in my "North American Slop Bucket" Chevy, parts might not be as cheap as you'd like, and if you've financed a sizable chunk of it on the purchase price you could find yourself up S-Creek without a paddle.
This is a business where the less you owe to anybody, the better off you are. 100% down and nothing left to pay has a lot to recommend for it.