Any damper is only as good as the equipment around it, so when you are replacing shocks absorbers and struts make sure your have the right service parts to get the most out of your suspension. If not already supplied with the shock or strut, BILSTEIN recommends replacing the bump stops and dust tubes. *Product benefits:* * All B1 Spare Parts components are designed to fit our BILSTEIN shock absorbers and struts. * All parts are produced to OEM standards and quality that BILSTEIN has built our reputation on. * Fitment is simple; all available components are designed to be used as original equipment replacements with no modifications required. PartNumber : bil10-255605 Description : B1 OE Replacement (Air) - Air Suspension Compressor Series : B1 OE Replacement (Air) Title : Bilstein Shock Absorbers California Proposition 65 : WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov 2012-2013 Mercedes-Benz S350 Bluetec 4Matic V6.2987cc Suspension::Shocks and Struts 2010-2013 Mercedes-Benz S400 Hybrid V6.3498cc Suspension::Shocks and Struts 2012-2013 Mercedes-Benz S550 4Matic V8.4663cc Suspension::Shocks and Struts 2007-2011 Mercedes-Benz S550 4Matic V8.5461cc Suspension::Shocks and Struts 2012-2013 Mercedes-Benz S550 Base V8.4663cc Suspension::Shocks and Struts 2007-2011 Mercedes-Benz S550 Base V8.5461cc Suspension::Shocks and Struts