On paper, the Volkswagen Jetta Sportswagen TDI looks like one of the best combinations of power, room, cargo utility and fuel economy, and at a reasonable price, but we are working on a case where the buyer of a Sportswagen has had confounding problems with the Diesel Particulate Filter system. The problem is complex but, in essence, a car that is great for long distance highway cruising may be totally unsuited for consumers who drive only (or mainly) short distances due to the filter system having insufficient time to heat up and burn off particulates. As I understand it the new model, a late-arriving 2015 model will not have the same problem because it has a DEF (urea mixture) emissions reduction sytem.
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