BMW M4 Convertible vs Mercedes-AMG C63 Cabrio Mercedes-Benz just unveiled its latest AMG variant of its C Class model line, the Mercedes-AMG C63 .br2016 Mercedes AMG C 63 S Coupe vs BMW M4 Coupe || Visual Design Comparison Subscribe br2016 Mercedes C63 S AMG Cabriolet Drive. Exterior: Designo diamond white bright. Subscribe .brWe put hi-tech launch control systems to the test in a range of performance cars to see how effective they are in a standing start. Weve got the Porsche 911 .