It will never be called a girlie car again. The SLK hard-top roadster has grown a considerable set of attachments—and they have an AMG badge. The most important ingredient for the 2012 Mercedes-Benz SLK55 AMG is a 5.5-liter V8 engine that’s turbocharged to come up with 415 hp and 398 lb-ft of torque. This has been bolted to a seven-speed, multi-mode automatic transmission driving the rear wheels, sending the car from standstill to 60 mph in 4.5 seconds. The car is coming this way early in 2012, with an optional performance package that offers a locking differential.