Premium 1643202031 Rear Air Shock Absorber for Mercedes-Benz W164 X164 with Ads. High-Quality Performance: Engineered for superior suspension performance and durability. 1-Year Warranty Coverage: Comprehensive 1-year warranty included for peace of mind. OEM Accepted: Compatible with original equipment manufacturer standards. Front Position Fitment: Designed specifically for front left and right installation. Gas-Filled Technology: Utilizes gas-filled air spring technology for smooth ride. Rubber Spring Material: Constructed with durable rubber for long-lasting reliability.