Bilstein B4 OE Replacement Rear Left Air Spring Module – 2007-2013 Mercedes-Benz S-Class / CL-Class (W221)

This Bilstein B4 OE Replacement rear left air spring module is a direct-fit AIRMATIC suspension replacement for the Mercedes-Benz W221 S-Class and CL-Class, covering the S350, S400, S550, CL550, and CL600. Confirm your vehicle's exact model year and factory air suspension configuration before ordering.