Volkswagen chief: VW is done with diesels in the U.S. If you’re an Audi fan, you were probably sad to learn that your fave luxury brand plans to offer just one diesel model in its U.S. lineup. But buck up, kiddo: that’s one more than fans of Audi’s mass-market sibling, VW, will have to choose from. Nissan Juke vs. Jeep Renegade: Compare Cars…