EPA city/highway mileage: 26/37
If everyone in the US got the chance to test-drive a Mercedes E320 BLUETEC, I bet the demand for diesel cars would go through the roof. With its 3-liter V6 powerplant, the E320 BLUETEC offers the passing power of a V8 with the fuel economy of a compact sedan -- pretty impressive for a car this big and luxurious. With a price premium of only $1,000 over the gasoline-powered version and significantly better fuel economy, the E320 BLUETEC just makes sense.