Arnott's premium mercedes-Benz suspension conversion kit C-3271 for the 2005-2013 S-Class (W221 chassis) with AIRMATIC and ADS and without 4MATIC features upgraded luxury dampers. This kit is built with Eibach® front and rear monotube sport shock absorbers custom valved for arnott to provide your vehicle with the comfort and handling S-Class owners expect. arnott's new design features steel springs made by Eibach in Germany. arnott also includes a special patented Electronic Bypass Module (EBM) (U.S. Pat. No. 9,329,917) to disarm the Airmatic system and eliminate dash panel error lights.