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

ENGINES 132.910 in MODEL 451.3/4 

O2 sensor downstream of catalytic converter 

Fig 1: Identifying O2 Sensor Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove interior flap above engine		AR88.40-P-1100-03MCC
2	Unfasten vent hose (2) on connector (arrow) of the air intake hose
3	Unfasten secondary air injection pump switchover valve (Y32) and place to one side with attached lines
4	Disconnect connector for O2 sensor downstream of catalytic converter (G3/1x1)
5	Remove O2 sensor downstream of catalytic converter (G3/1) from catalytic converter	22 mm socket wrench   : Coat thread on O2 sensor downstream of catalytic converter (G3/1) with paste.	*BA14.00-P-1003-01B
		Paste	*BR00.45-Z-1005-06A
6	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
7	Carry out an engine test run and check exhaust system in the area of the O2 sensor downstream of catalytic converter (G3/1) for leaks