We're normally used to seeing various V-6 and V-8 powerplants lurking underneath the hood of a Mercedes-Benz SLK, but reports indicate the next-generation roadster will also use a diesel four-cylinder.
According to Automotive News, the diesel SLK will likely use the engine found in the European C250 CDI - a 2.2-liter twin-turbocharged I-4 that's good for 204 horsepower and 369 lb-ft of torque. Sounds like it could be sporty enough for the little SLK, but Mercedes is also stoked on its clean performance. In the C250, it delivers around 45 mpg on the European test cycle, and produces only 138 grams of carbon dioxide per kilometer. The idea of a diesel-powered sports car may sound weird to some Americans, but a diesel SLK will already have some competition once it comes to market. The Audi TT is already offered with Volkswagen's 2.0-liter turbo-diesel I-4 (or TDI), although it's relegated to the European market only. That's likely where the diesel SLK will remain, though Americans should expect other versions of the redesigned convertible in early 2010. Source: Automotive News Europe