Unity automotive has over 50 years of experience manufacturing parts in the aftermarket automotive industry. The company offers superior quality, specializing in making rock solid auto parts that withstand the test of time. With a true understanding of their marketplace they have become the industry leader in innovation of aftermarket suspension. Unity automotive delivers top of the line quality suspension parts made to insure a trouble-free installation and long-lasting reliability. The Elite Suspension Line Powered by Unity offers Replacement Air Suspension Solenoid Valve Blocks. The Valve Block reduces moisture in your air suspension system while keeping your air compressor from overworking, causing potential leaks and damage. Restoring your air suspension system to a more reliable, safe, comfortable ride. This Product Fits: 2006-2006 Mercedes-Benz CLS500, 2006-2006 Mercedes-Benz CLS55 AMG, 2007-2011 Mercedes-Benz CLS550, 2007-2011 Mercedes-Benz CLS63 AMG, 2003-2009 Mercedes-Benz E320, 2006-2009 Mercedes-Benz E350, 2003-2009 Mercedes-Benz E500, 2003-2006 Mercedes-Benz E55 AMG, 2007-2009 Mercedes-Benz E550, 2007-2009 Mercedes-Benz E63 AMG