BEAST...
Brabus 800 E V12 Cabriolet
Let's see... you need a ridiculously fast car, with open-air credentials, and the ability to haul four people around comfortably. The Brabus 800 E V12 Cabriolet (€478,000; roughly $670,000) meets all these criteria and more. Based on the E-Class Cabriolet, the 800 sports a 788hp engine based on the V12 of the S 600, improved aerodynamics thanks to body modifications, 10-inch-wide, 19-inch wheels, a custom high-performance braking system, and the ability to go from 0-62 mph in just 3.7 seconds on your way to a top speed of 231.
http://uncrate.com/stuff/brabus-800-e-v12-cabriolet/