Watch The Legendary BMW M3 CSL Battle The 2015 M235iPatrick George4/26/14 2:00pm6511EditPromoteDismissUndismissHideGo to permalink Top Gun. Top dog. The best of the best. That's how I would describe the M3 CSL version of the E46 BMW M3. This Euro-only special edition dropped the weight and added the paddle-shift SMG transmission to make a great car even better.