ISO HARNESS ADAPTER FITS MERCEDES A-CLASS - 2004 W169/W176 B-CLASS - 2005 W245/W246 C-CLASS - 2004 - 2014 W203/W204 CLK - 2004 W209 ML - 2005 - 2016 W164/W166 R-CLASS - 2006 W251 SPRINTER - 2006 VITO - 2006 W639 GL - 2006 X164 QUADLOCK/FAKRA Description This adapter is required when replacing your