2012 Modern Opel Rak E Concept Car. Opel and KISKA have teamed up to style a new urban commuter, the Opel Rak E concept. This four wheel, single-row vehicle is made to seat two comfortably beneath a forward-rising windshield. Its exterior is sharp and angular, with a curvy aerodynamic rear end that’s accented by a set of extended rear wheels. It’s a design that does not everyone will like, but those who do will definitely fall hard for that one. The Opel Rak E concept is not just the green-minded, city-friendly specs that attract us to the Opel Rak E, it’sthe futuristic design philosophy which it embodies.