Mercedes-has built this concept car that has a pretty eye-catching transforming rear. Called the Mercedes-Benz Concept IAA (Intelligent Aerodynamic Automobile), it has the ability to transform its shape while driving in order to reduce drag and increase efficiency. When the car gets going above 80 km/h, it transforms.
A number of panels on the front, rear, and sides deploy to reduce the drag coefficient to just 0.19. If actually produced, that would give it the best drag coefficient of any production car, alongside the current Volkswagen XL1. But don’t hold your breath for that first part.
The Mercedes-Benz Concept IAA is Like a Real-Life Transformer