2012 Mercedes-Benz CLS63 AMG.

2012 Mercedes-Benz CLS63 AMG. What is it? A more fuel-efficient AMG.

What makes it tick? The new twin-turbocharged 5.5-liter V-8 engine, which makes 550 horsepower and 590 pound-feet of torque with the optional AMG Performance Package (without, those figures are 518 and 516, respectively). The Speedshift MCT 7-speed sport transmission helps to achieve an estimated fuel economy of 16 miles per gallon in the city and 21 on the highway, a 33 percent improvement over the departing 6.2-liter. In the span of two weeks, Mercedes-Benz announced two new CLS-based production models: the recently revealed CLS63 AMG and plans to produce a wagon version inspired by the CLS "Shooting Brake" Concept shown at the Beijing Motor Show. Now we've learned that another CLS variant could combine the two.
The CLS63 AMG Shooting Brake would adapt all the go-fast bits of its sedan counterpart into the five-door model set to go into production in 2012. That means the M157 5.5-liter twin-turbocharged V8 putting out between 518 and 550 horsepower and up to 590 pound-feet of torque depending on the spec. We've yet to get official word from M-B if the CLS Shooting Brake is bound for U.S. shores, but if the AMG version does come to fruition, don't expect it much before 2013.
Additionally, AMG execs told us that diesel performance models from the in-house tuner are a long way off. More to the point, AMG officials believe that gasoline engines have the potential to return just as much torque and fuel economy as their oil-burning counterparts, negating the need to develop high performance diesels. Here's hoping they're right...

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