A number of new Mercedes-Benz cars were unveiled to the world at the IAA Frankfurt Motor Show 2015. Unquestionably the biggest surprise from the German marque was the Concept IAA. Other highlights included the S-Class Cabriolet in S500 and S63 AMG guises as well as the Mercedes-AMG C63 range.

First of all, the Concept IAA is powered by a turbocharged 2.0-litre four-cylinder petrol engine mated to an electric motor. The internal combustion engine delivers a total of 208 hp while the electric motor adds an extra 80 hp, resulting in a total of 275 hp and 442 lb-ft of torque. 

As the name of the car stands for Intelligent Aerodynamic Automobile, the German marque has ensured that it is as aerodynamically efficient as possible. All told, the car has a drag coefficient of just 0.19 when the ‘long tail’ mode is enabled which adds 390 mm to the vehicle’s length. That mode is automatically enabled at speeds over 50 mph.

As for the S-Class Cabriolet, it is most closely related to the S-Class Coupe but features some mechanical modifications. Most notably there is a new die-cast aluminium longitudinal member, a new rear wall behind the rear seats to reinforce the bodywork and an aluminium rear floor. All of these elements help to make up the lack of a fixed roof.

Finally we have the Mercedes-AMG C63 range. It utilises a twin-turbocharged 4.0-litre V8 engine which in standard spec delivers 469 hp between 5500 and 6250 rpm and 650 Nm of torque. By comparison, the more potent C63 S produces 510 hp and 700 Nm.

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