I. OE Replacement Part: 0121715114, 0121715006 AL0844N, AL0844X, 2721540802 0131543502, 0131545602, 0121715014, A0131545602 12752, 15710, 213-8773, 440219, A3220, II. Compatibility: Replacement for Mercedes CL550 5.5L 2007-2010 Replacement for Mercedes CLK550 5.5L 2007-2009 Replacement for Mercedes CLS550 5.5L 2007-2011 Replacement for Mercedes E350 V6 3.5L 2006-2011 Replacement for Mercedes E550 5.5L 2007-2011 Replacement for Mercedes G550 5.5L 2009-2015 Replacement for Mercedes G65 AMG 6.0L 2016-2018 Replacement for Mercedes GL450 4.7L 2008-2009 Replacement for Mercedes GL550 5.5L 2008-2010 Replacement for Mercedes ML350 V6 3.5L 2008-2010 Replacement for Mercedes ML450 3.5L 2010 Replacement for Mercedes ML550 5.5L 2008-2010 Replacement for Mercedes R350 V6 3.5L 2007-2010 Replacement for Mercedes S550 5.5L 2007-2011 Replacement for Mercedes SL550 5.5L 2011-2012 Replacement for Mercedes SL550 5.5L 2007-2009 Replacement for Mercedes SL65 AMG 6.0L 2014-2018 Replacement for Mercedes SLK350 3.5L 2010 Note: 180A, 12V, CW, 6-Groove Pulley