Wheel alignment is absolutely crucial when modifying your car. Alignment can effect every aspect of your driving experience, from straight line stability, under-steer, over-steer, acceleration, braking and tire wear. Although stock components allow slight alignments from the stock suspension settings, they often are not able to properly align the car after the suspension has been modified. From the factory, most cars are set to have under-steer and for optimum tire wear at stock height; under-steer is often undesired from a performance standpoint but is always dependent on driver style, therefore the adjust-ability of the alignment of a vehicle is critical when tuning for speed. The clock does not lie and having the vehicle alignment can make seconds of a difference. Megan Racing Inc. has developed reinforced and adjustable control arms to accommodate the needs of the aggressive and performance oriented tuner. Being constructed of a Lightweight Steel-Alloy which is able to withstand the stresses of extreme competition, these arms are powder-coated with a 3-Stage process to ensure durability and protection against the elements. SPECIFICATIONS & FEATURES: - Fit Mercedes Benz W211 E-Class Sedan 2003-2009 RWD or AWD (Do not fit models with air suspension) NOTE: On applications with Xenon headlights, there is a level sensor on the OEM rear camber arm (as well as on the right front suspension) which renders this product unusable. For Europe, Xenon light equipped cars have this system by law. - Made with high-strength and anti-cranking rubber material - Rubber viscosity is around 2000KGS - Direct replacement/ no modifications needed