Brabus, the German aftermarket auto tuner, has unveiled its 800 E V12 Cabriolet, a drop top based on the Mercedes E-Class Convertible. Under the hood is a modified engine borrowed from the Mercedes S600: a 788-horsepower biturbo 6.3-liter V12, with an electronically limited 811 lb-ft of torque. This means the car can reach 0-62 mph in 3.7 seconds, 124 mph in 9.9 seconds, with a top speed of 231 mph. It is the fastest four-seat convertible in the world. Sylistically, the vehicle has an aerodynamic carbon fiber body kit, the front apron shaped to reduce lift on the font axel and channel cooling air to the radiators and front brakes. Each unit is built to order, but this kind of power doesn't come cheap: prices start at â‚¬478,000 ($681,200).