I. OE Replacement Part:

012 171 51 14, 012 171 50 06, 0121715114, 0121715006
AL0844N, AL0844X, 11220N, 2-11220, 11220, 2721540802
0131543502, 0131545602, 0121715014, A0131545602
12752, 15710, 213-8773, 440219, A3220, DRB7670
II. Compatibility:

Replacement for Mercedes CL550 C216 2007-2010 V8 5.5L
Replacement for Mercedes CLK550 C209 2007-2009 V8 5.5L
Replacement for Mercedes CLS550 C219/C218 2007-2011 V8 5.5L
Replacement for Mercedes E350 W211/W212 2006-2011 V6 3.5L To 10/5/2005
Replacement for Mercedes E550 W211/W212 2007-2011 V8 5.5L
Replacement for Mercedes G550 W463 2009-2015 V8 5.5L
Replacement for Mercedes G65 AMG W463 2016-2018 V12 6.0L
Replacement for Mercedes GL450 X164 2008-2009 V8 4.7L
Replacement for Mercedes GL550 X164 2008-2010 V8 5.5L
Replacement for Mercedes ML350 W164 2008-2010 V6 3.5L
Replacement for Mercedes ML450 W164 2010 V6 3.5L
Replacement for Mercedes ML550 W164 2008-2010 V8 5.5L
Replacement for Mercedes R350 W251 2007-2010 V6 3.5L
Replacement for Mercedes S450 W221 2009 V8 4.7L
Replacement for Mercedes S550 W221 2007 V8 5.5L w/ Standard Equipment, To 8/31/2006
Replacement for Mercedes S550 W221 2008-2011 V8 5.5L
Replacement for Mercedes SL550 R230 2007-2009 V8 5.5L
Replacement for Mercedes SL550 R230 2011-2012 V8 5.5L
Replacement for Mercedes SL65 AMG R230 2014-2018 V12 6.0L
Replacement for Mercedes SLK350 R171 2010 V6 3.5L
Note: 180 Amp, 12 Volt, CW, 6-Groove Pulley