We’ve loved the latest-generation Mercedes-Benz S63 AMG Coupe since launch day but boy is the Brabus 850 6.0 Biturbo Coupe a stunning upgrade. Aesthetically, the Brabus revision introduces larger intakes and clear-coated carbon-fiber aerodynamic-enhancement components seen up front and on the rear, 21-inch high-tech forged wheels and an exclusive Brabus fine leather interior. The details are extensive to say the least, and of course the powertrain gets some edits as well. The S63 AMG’s 5.5-liter, biturbocharged V8 is now housing a little over 5.9 liters and is mated to two Brabus turbochargers, as well as new exhaust manifolds and a stainless steel exhaust system. There’s a new intake module to give those new turbos some air and the ECU’s been updated to increase performance as well. What hasn’t been changed is the S63 AMG’s seven-speed gearbox as well as the 4Matic all-wheel-drive system. In the end, we get a big body coupe that dishes out 850 horsepower and an electronically limited 848 pound-feet of torque, taking it from 0 to 62 in 3.5 seconds and a top speed of 217 mph. It’s important to note that the car can actually deliver 1,069 lb-ft of torque, but it’s been scaled back a bit to preserve the longevity of the powertrain. Think we should be good with 848 for now, guys, thanks. Look for the Brabus 850 6.0 Biturbo Coupe to make its world debut at the 2015 Geneva Motor Show next week.