Each Mercedes strut is painstakingly tested, disassembled, cleaned, recharged, painted and rebuilt from the ground up. The Arnott remanufactured strut features a new multi-ply rubber air bladder manufactured by Continental ContiTech along with heavy duty crimping rings, new O-Rings, bump stop, bottom seal, wiring harness and air line fitting. The Arnott remanufactured strut design is not only more efficient, but it is also much more affordable! All Arnott remanufactured struts are designed to work with the vehicle's Adaptive Damping System (ADS) and Auto Leveling functionality.