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

ENGINES 278 in MODELS 207, 212, 218 

ENGINES 157 in MODEL 212, 218 

Fig 1: Identifying Heated O2 Sensor Remove/Install Components (1 Of 3)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Heated O2 Sensor Remove/Install Components (2 Of 3)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Heated O2 Sensor Remove/Install Components (3 Of 3)

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of injury  caused by fingers being pinched or crushed when removing, installing or aligning hoods, doors, trunk lids, liftgates or sliding roof	Keep body parts and limbs well clear of moving parts.	AS00.00-Z-0011-01A
	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	Switch off ignition
2.1	Secure vehicle on vehicle lift	To remove the LH oxygen sensors
		Model 207	AR00.60-P-0100CW
		Model 212, 218	AR00.60-P-0100EWS
2.2	Raise vehicle	To remove the RH oxygen sensors
3	Remove engine compartment paneling		AR61.20-P-1105EW
	Remove LH oxygen sensors (G3/3 or G3/5)
4	Detach rear engine crossmember from vehicle underbody and lower transmission		AR22.10-P-1180CW
5	Detach CAT from exhaust manifold and transmission and secure against falling down	Sensor cables must not be subjected to tensile stresses. Model 207	AR49.10-P-7100CW
		Model 212, 218	AR49.10-P-7100EL
6	Unclip electrical connection (G3/3x1, G3/5x1) for oxygen sensor from bracket on transmission (5)
7	Remove oxygen sensor (G3/3 or G3/5) from catalytic converter (1)	Coat thread with heat-resistant lubricant. Ensure correct routing of oxygen sensor lines.	*BA14.00-P-1005-01A
			Figure
		Paste	*BR00.45-Z-1005-06A
	Remove RH oxygen sensors (G3/4 or G3/6)
8	Unclip electrical connection (G3/4x1, G3/6x1) for oxygen sensor from bracket on transmission (5)
9	Remove oxygen sensor (G3/4 or G3/6) from catalytic converter (2)	Coat thread with heat-resistant lubricant. Ensure correct routing of oxygen sensor lines.	*BA14.00-P-1005-01A
			Figure
		Paste	*BR00.45-Z-1005-06A
10	Install in the reverse order
11	Read out fault memory with STAR DIAGNOSIS and erase if necessary		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 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
12	Test run engine and check exhaust system for leaks

Fig 4: Identifying Box Wrench Bit (000 589 71 03 00)

Courtesy of MERCEDES-BENZ USA