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Bilstein B3 OE Replacement Rear Air Suspension Spring for 2017-2019 Mercedes-Benz GLS550 GS350 H&R Sport Springs for yourBilstein B3 OE Replacement (Air) Suspension Air Bags for the 2017 2019 Mercedes Benz GLS550 are designed to replace the original suspension air bags on select European brand vehicles. Bilstein is an OE supplier for air suspension systems; the quality of these products meets, and typically exceeds, the standards set forth by the vehicle's manufacturer. Each B3 OE Replacement (Air) suspension air bag is designed to connect directly into the original