In North America the Volkswagen Jetta TDI Wagon is probably going to be somewhat of a niche car; not for everyone. It will appeal to buyers who prefer compact dimensions for city driving and are willing to give up a little rear seat room, who can use the versatility of a wagon, and who appreciate a level of refinement rarely found in cars of this class. Those buyers probably plan to keep their car for a long time, so they'll reap a bundle of cash in fuel savings while enjoying an engine that just keeps on going and going, to paraphrase a well-known TV commercial. The diesel, in spite of how it echos in the bowels of a ship, is a vast improvement over previous generations and yes, it's clean. But some folks, reared on the sound and feel of gasoline engines, would probably never adjust to the difference. Those who do will be driving a handsome vehicle that adapts to oversize cargo and feels at home in both town and country. If ever I get a chance to tour the classy decorator shops in Montecito, near Santa Barbara, the 2004 Volkswagen Jetta TDI Wagon is the car I'd like to do it in.