Aerosus air suspension struts replace the original air suspension strut of your vehicle & offer you maximum ride comfort with high durability. Security, accuracy & quality of the product match the original part. This brand new rear air strut fits both left & right side of Mercedes S-Class (W 220) vehicles with ADS (Adaptive Damping System) & 4matic (AWD four-wheel drive system). Aerosus air suspension struts are made from high-quality materials & are covered by a 2-year limited warranty & a 30-day money-back guarantee. Each strut comes complete with air spring & shock absorber as well as the new electromagnetic control valve. All our strut modules are new, high-performance parts. Our air struts are designed for superior ride quality by adjusting quickly to different road & vehicle conditions, while offering ultimate safety & functionality & bespoke driving experience. Features OE-quality air suspension strut Security & durability Maximum ride comfort Adjustable to different road & vehicle conditions Safe load carrying capacity & stability Ready to install Electromagnetic control valve Thousands of satisfied customers worldwide