SK-3012 is an Arnott designed new rear shock for the right or left side of the 2003-2009 Mercedes-Benz E-Class (W211) and the 2005-2011 CLS-Class (W219) Sedan's only - both with AIRMATIC and with ADS, incl AMG's. The new shock bypasses the often-problematic Adaptive Damping System (ADS) and includes a coil resister which plugs in to the vehicle’s electrical system to eliminate any suspension dashboard warning lights. This completely new shock includes a new polyurethane bump stop, protective dust boot, and new top and bottom mounts. This replacement Mercedes-Benz E-Class rear shock is assembled by Arnott in the USA.