Remove/install O2 sensor - AR07.04-P-0080MCV

ENGINES 132.910 in MODEL 451.3/4 with CODE (494) USA version 

O2 sensor upstream of catalytic converter 

Fig 1: Identifying O2 Sensor Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of injury  to skin and eyes caused by handling hot or glowing objects.	Wear safety gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
1	Raise vehicle with vehicle lift
2	Remove bolts (2) and unhook rear apron (1) from brackets (arrows)
3	Support rear muffler (4) using a transmission jack (6) and removal fixture (5)	Removal fixture Transmission jack	Fig 2
4	Unhook rear muffler (4) from rubber retainers (3)
5	Lower rear muffler (4) with transmission jack (6) and removal fixture (5) until the O2 sensor upstream of catalytic converter (G3/2) is accessible	Removal fixture Transmission jack	Fig 2
6	Unclip holder (7) for connector for O2 sensor upstream of catalytic converter (G3/2x1) and disconnect connector for O2 sensor upstream of catalytic converter (G3/2x1)
7	Unscrew O2 sensor upstream of catalytic converter (G3/2) from catalytic converter (8)	Use a suitable 22 mm socket wrench. : Coat thread of O2 sensor upstream of catalytic converter (G3/2) with paste.	*BA14.00-P-1002-01B
		Paste	*BR00.45-Z-1005-06A
8	Install in the reverse order
	Risk of accident  caused by vehicle starting off by itself when engine is running. Risk of injury  caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
9	Perform engine test run and check exhaust system for leakage in area of O2 sensor upstream of catalytic converter (G3/2)

Fig 2: Identifying Removal Assembly (450 589 02 62 00)

Courtesy of MERCEDES-BENZ USA