ARNOTT REAR AIR SUSPENSION SPRING MERCEDES-BENZ E-CLASS - 2003-2009 (W211 W/AIRMATIC & W/4MATIC) (FITS LEFT OR RIGHT) Arnott Part Number:A-2724 OEM Part Number: 2113200725, 2113200825, 2113201525, 2113201625 Arnott now offers a newly redesigned aftermarket Mercedes-Benz air spring for the rear of the E-Class. This new Mercedes replacement rear air spring features a 4-ply Continental 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 with pride in the USA. Kit Includes: • 1 Rear Air Spring • New Airline Fitting • New Upper Retaining Pin • Detailed Instruction Manual NOTE: If replacing an O.E. unit with an Arnott Air Spring A-2724 you MUST replace both rear air springs at the same time. Warranty Information:Limited Lifetime.