vehicles with a TDI (Turbocharged Direct Injection) engine, which lends class-leading fuel economy to several models. They were a three-way tie for 8th (TDI Beetle, TDI Golf, TDI Jetta) and ninth, the TDI Jetta Wagon. In addition, all Volkswagen TDI diesel engines produced from 1996 to 2006 can be driven on 100% biodiesel fuel. For the 2007 model year, however, strict US government emissions regulations had forced Volkswagen to drop most diesels from their US engine lineup, but a new lineup of diesel engines (then thought) compatible to US standards returned to the American market starting with Model Year 2009. These post-2009 Clean Diesel engines are limited to running on 5% (B5) biodiesel only to maintain Volkswagen's warranty. Volkswagen long resisted adding a SUV to its lineup, but relented with the introduction of the Touareg, made in partnership with Porsche, while they worked on the Porsche Cayenne and later the Audi Q7. Though acclaimed as a fine handling vehicle, the Touareg has been a modest seller at best, and it has been criticised by auto reviewers for its absence of a third-row seat, the relatively poor fuel economy, and the high vehicle mass. Volkswagen set plans to add a compact SUV with styling influences from the "Concept A" concept vehicle introduced at the 2006 Geneva Auto Show, and on 20 July 2006, Volkswagen announced that the new vehicle called the Tiguan. Since the discontinuation of the T4 in 2003 and the decision not to export the T5 to the United States, Volkswagen, coincidentally, lacked a van for its North American lineup. To remedy this, Volkswagen launched the Volkswagen Routan, a badge-engineered Dodge Grand Caravan made for the American and Canadian markets, in 2008. In September 2006, Volkswagen began offering the City Golf and City Jetta only for the Canadian market. Both models were originally the Mk4 Golf and Jetta but were later replaced with the Brazilian versions of the Golf Mk4 and Bora. Volkswagen's introduction of such models is seen as a test of the market for a subcompact and, if successful, may be the beginnings of a thriving subcompact market for Volkswagen. In May 2011, Volkswagen completed Chattanooga Assembly in Chattanooga, Tennessee. The Chattanooga Assembly plant marked VW's first plant since the plant at New Stanton was closed down. The facility has produced Volkswagen cars and SUVs specifically designed for the North American markets, beginning with the Passat B7