This extreme performance also places highest demands on the vehicle’s aerodynamic properties. The BRABUS designers went into the wind tunnel to develop a body conversion kit made from high-strength yet especially lightweight carbon fiber. It not only adds 36 millimeters (1.4 inches) to the width of the E-Class and gives it an even more striking appearance; it also minimizes aerodynamic lift on front and rear axle. Air vents located behind the wheel arches were integrated into the front fenders. They are also vital to the thermal health of all components in the engine bay and help vent the front wheel houses to reduce lift on the front axle. Also part of the sophisticated aerodynamic-enhancement concept is the rear wing on the trunk lid and the diffuser integrated into the rear apron. A wider track means better directional stability at high speeds. The widened fenders front and back make room for BRABUS Monoblock Q wheels in size 9.5Jx19. The high-performance tires so essential for these extreme speeds are supplied by technology partners Pirelli and YOKOHAMA. They are mounted on the front axle in size 255/35 ZR 19 and in size 285/30 ZR 19 in back.