What It's Like To Drive The 700-hp RENNtech Mercedes CLS63 AMG

The car world is lousy with fly-by-night tuning shops. RENNtech isn't one of them. Founded in the 1980s by 15-year AMG veteran Hartmut Feyhl, the Florida shop has put the screws to hundreds of Mercedes-Benz (as well as Porsche and BMW) products over the decades. » 9/05/12 3:40pm 9/05/12 3:40pm

Nissan GT-R and CLS 63 AMG combine for 1,080 horsepower of hoonage

Fourteen cylinders, 1,080 horsepower and six wheel drive. It's what happens when you let our friends loose on an abandoned airfield with a Nissan GT-R and Mercedes CLS 63 AMG. » 10/26/11 1:00pm 10/26/11 1:00pm