(Lambda Probe, O2 Sender)

DOWNSTREAM:
2007-2009 E320 Bluetec - Req. 1

UPSTREAM:
2009-2010 CL550 - RIGHT Side Only
2013 GL63 AMG - Req. 2
2010 ML350/GL350 Bluetec - Up to VIN A662484 (up to 06/10/2010 production date) 
2012 ML350 - Req. 2
2012-2013 ML63 AMG - Req. 2
2009 R320 Bluetec - Req. 1
2008-2011 S450 4Matic - RIGHT Side Only
2007-2011 S550 4Matic - RIGHT Side Only
2010-2013 S400 Hybrid - Req. 2