Remove/install heated O2 sensor - AR07.52-P-5303TS

ENGINE 272, 273 in MODELS 211, 219 

Shown on models 211.056/256 

Fig 1: Identifying Heated O2 Sensor Remove/Install Components - Shown On Models 211.056/256

Courtesy of MERCEDES-BENZ USA

Shown on models 211.087/287 

Fig 2: Identifying Heated O2 Sensor Remove/Install Components - Shown On Models 211.087/287

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
	Notes on avoiding damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
1	Turn key in ignition switch to position "0".
2	Remove rear section of lower engine compartment paneling	Install engine compartment paneling only after the engine test run.
		Model 211	AR61.20-P-1105T
		Model 219	AR61.20-P-1105TX
3	Unclip electrical connector and electrical feed line for corresponding O2 sensor out of retaining clamps on transmission
4	Disconnect electrical connector for corresponding O2 sensor
5	Unscrew corresponding O2 sensor out of the catalytic converter completely	Coat the thread with heat- resistant lubricant.
			*BA14.00-P-1002-01A
			Figure
		Paste	*BR00.45-Z-1005-06A
6	Install in the reverse order
7	Read out fault memory	STAR DIAGNOSIS, diagnosis system
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
	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 running engine	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not grasp hot or rotating parts.	AS00.00-Z-0005-01A
8	Conduct engine test run and check exhaust system for leaks

Fig 3: Identifying Box Wrench Bit (000 589 71 03 00)

Courtesy of MERCEDES-BENZ USA