From the initial vision to the final production SLK model – watch the development and testing of the new 2012 Mercedes-Benz SLK-Class below. Under the body of the new roadster a gigantic effort has been taken, intense engineering work, including several years of test runs. Freezing cold, scorching heat and long-term stress tests – these are only three of the many hurdles Mercedes-Benz engineers had to overcome to bring the SLK Roadster into series production