This four-door coupe can transform, while moving, from its sedan-like design mode to an ultra-sleek, gas-powered fish of a car. The IAA can transform automatically at 80 kilometers per hour (about 50 miles per hour) or via the press of a button. The show car is a shapeshifting S-Class-sized beast of a four-door coupe, which automatically grows 390mm in length when you pass 50mph. Bonkers. The front bumper features panels that extend 25mm forward into the airflow, while a Cruella deVil-spec valance protrudes an extra 20mm out of the back. The front bumper retreats some 60mm underneath the car, and even the wheels seal up to cut drag. The Concept IAA is currently being showcased at the 2015 Frankfurt Motor Show.