The C-Class cars are a mix of design cues from other Mercedes-Benz cars. All C-Class models feature quad ovoid headlamp assemblies that are joined, very similar in design to that of the CLK and SL models. C-Class sedans wear the horizontal-bar grille topped with the traditional three-pointed star hood ornament, very similar to that of the S-Class and E-Class sedans, but the much smaller C-Class sedans nonetheless have a tight look all their own. Aerodynamically, they're among the slickest cars in the Mercedes-Benz family. The C-Class sedans boast a drag coefficient of 0.27, lowering wind noise, improving fuel efficiency, and theoretically increasing their top speed.C-Class coupes feature unique styling, with a radical roofline, a shortened rear end, and an aggressive front end and. In fact, not a single exterior panel is shared between the sedan and the coupe. Up front, the Mercedes star-grille is used in place of the sedan's bar-grille, with the tri-star badge ensconced in the grille work, similar to that of the SL, CLK, and CL models. The coupe's double-elliptical headlights are similar to those of the C-Class sedan. The swooping roofline incorporates a smoked Plexiglas panel. A rear spoiler adds aerodynamic downforce to the rear tires, good for high-speed curves in the rain, and a glass panel between the tail lights contributes to rearward visibility and gives it a distinctive appearance. The coupe is 7 inches shorter than the sedan in overall length, but all C-Class cars ride on the same 106.9-inch wheelbase. The coupe's long doors make for easy ingress and egress. Nice touches include sporty wheels and turn signal repeaters built into the outside mirrors.