Mercedes-Benz has said that the CLA was the most aerodynamic series produced model on the market and had a drag coefficient of0.23. But according to recent aerodynamics test made at an independent wind tunnel, the CLA's drag coefficient is much lower at 0.30.

Car&Driver tested the Tesla Model S and found it to be the most aerodynamic car, with a Cd of 0.24 followed by a Prius at 0.26, Chevrolet at 0.28, and Mercedes-Benz CLA at 0.30 and Nissan Leaf at 0.32. Watch the video below: