The short story is that the Black Series gets a 500-horsepower version of AMG’s 6.3-liter V8 connected to a 7-speed AMG Speedshift transmission with a shorter final drive ratio and Manual or Sport shift programs (obviously, Comfort is left off the software for this model). Acceleration to 60 mph takes 4.1 seconds and top speed is 186 mph. Other goodies include larger vented and perforated composite disc brakes, strut braces under the hood and in the trunk, and a stability control system calibrated for track driving. The suspension has shocks adjustable for toe-in and camber, jounce and rebound, and height. There’s a bigger radiator, a second transmission oil cooler, a limited-slip differential, and an AMG sports exhaust system. Take that, M3.