"With a gently sloping roofline, swept-back taillights and flowing character lines on its flanks, the CLA’s styling draws heavily from the latest iteration of the original “four-door coupe,” the CLS-Class. Notably, the sleek look isn’t a mere stylistic trompe l'oeil – with a drag coefficient of just 0.23 Cd, the CLA is the most aerodynamic series production car ever created, according to Mercedes."