Last December, Brabus conferred an aggressive makeover to the Mercedes-Benz S 63 AMG, applying an eye-catching satin gold finish complemented with a number of carbon fiber aftermarket body parts, not to mention an additional 261 HP over the stock engine’s usual output. The follow-up is this Brabus 850 6.0 Biturbo Coupe, which is based on the S63 AMG Coupe and set to debut next month in Geneva. Right out of the gate, the engine was given a modified crankshaft with a longer stroke, as well as an enlarged cylinder bore and larger forged pistons, resulting in the engine’s displacement expanding to 5,912 cc from the standard 5,461 cc. Combined with Brabus turbochargers and modified exhaust manifolds, the revised engine is now good for 850 HP and a maximum 1,069 lb-ft of torque. A 0 – 62 mph sprint time is clocked at 3.5 seconds before the car reaches a top speed of 217 mph. The exterior sees the addition of a carbon-fiber aerodynamic body kit, featuring a new front bumper with large intakes and spoiler, a custom rear diffuser and trunk-lid spoiler. Side air outlets receive carbon-fiber surrounds, while Platinum Edition 21-inch cross-spoke alloys are finished in Shadow Gold Chrome, making for what promises to be an auspicious debut at Geneva.