Mercedes-Benz SL-Class: The SL earns top marks in its segment for its aerodynamic performance too. It boasts the lowest coefficient of drag, wind noise levels on a par with saloon cars and peerless comfort when driving with the roof down, as well as preventing dirt build-up most effectively. Wind tunnel

Daimler Global Media Site - Mercedes-Benz SL-Class: The SL earns top marks in its segment for its aerodynamic performance too. It boasts the lowest coefficient of drag, wind noise levels on a par with saloon cars and peerless comfort when driving with the roof down, as well as preventing dirt build-up most effectively. Wind tunnel