Location and assignment of line and plug connectors, engine compartment, left - GF00.19-P-1000-01MCU

Fig 1: Locating Downstream And Upstream O2 Sensors Of CAT Connector

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Code	Designation	Cable colors	Cable colors	Notes
G3/1x1	O2 sensor downstream of CAT connector	1	gn
		2	BK
		3	BU
		4	YE
G3/2x1	O2 sensor upstream of CAT connector	1	GNBK
		2	BK
		3	BU
		4	BK
		5	YE
		6	WH