Jetta TDI Preview – Washington D.C. Auto Show: Volkswagen has sold TDIs on and off in the U.S. for the past several years, and with the 2008 Jetta TDI, it’s on again. Thanks to a better particle scrubbing system, nitrogen oxide reducing technology and new low-sulfur clean diesel fuel that debuted last October, the new Jetta TDI will meet strict Tier 2/Bin 5 emission requirements, meaning that Volkswagen’s latest TDI diesels are a far cry from the smoke-belching Rabbits of the ‘70s. The 2008 Jetta TDI, in fact, is expected to be 50-state legal for the first time since five states adopted tough California Air Resource Board (CARB) emissions standards.