Aerosus air supension struts replace the original strut of your vehicle and fit front left side of Mercedes-Benz E-Class (W 211) vehicles with both Airmatic (ADS – Adaptive Damping System) and 4matic (AWD four-wheel drive system). Each air suspension strut comes complete with air spring, shock absorber and electromagnetic control valve. Professionally rebuilt according to original manufacturer specifications, the product has been completely disassembled, cleaned, and examined for wear and breakage. All worn out components of the strut, such as air spring, sealing rings and crimping rings, have been replaced with new, high-quality parts to ensure maximum safety and ride comfort. The product features a high-quality finish with a new dust cover and new aluminum pistons, giving it the appearance of a brand new product. Remanufacturing also produces significant environmental benefits through savings in material and energy through reuse of components. An additional core deposit is added to the purchase price and will be refunded once the used original suspension part is returned to us. Our air suspension struts are designed for superior ride quality by adjusting quickly to different road and vehicle conditions, while offering ultimate safety and functionality. All Aerosus air struts are covered by a 2-year limited warranty and 30-day money-back guarantee. Aerosus products offer you the ultimate driving experience. Features Completely rebuilt high-quality OE air suspension strut New sealing, crimping ring and dust cover Security and durability Maximum ride comfort Adjustable to different road and vehicle conditions Safe load carrying capacity and stability Ready to install Electromagnetic control valve Thousands of satisfied customers worldwide