Number of Grooves on Pulley 6-Groove Pulley. 2006-2011 E350 (submodel: 4Matic, Base) Upper. 2008-2010 C300 Base Upper, Grooved Pulley. 2008-2011 C300 (submodel: Luxury, Sport) Upper, Grooved Pulley. 2008-2012 C300 (submodel: 4Matic Luxury, 4Matic Sport) Upper, Grooved Pulley.
