Arnott now offers a newly redesigned aftermarket air spring for the rear of the Mercedes-Benz E-Class (W211) and CLS-Class (W219). This new Mercedes replacement rear air spring features a 4-ply Continental ContiTech bladder, CNC-machined crimping rings and a custom-designed tapered piston for a comfortable ride. The Arnott aftermarket Mercedes rear air spring simplifies installation by eliminating the OE reservoir. This exclusive spring was engineered and assembled in the USA. Arnott backs this replacement air spring with a Limited Lifetime Warranty! NOTE: If replacing an OE unit you MUST replace both rear air springs at the same time.