Remove/install an oxygen sensor - AR14.00-P-5303GZ

WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2012 Mercedes-Benz GL550, 2012 Mercedes-Benz GL450, 2011 Mercedes-Benz ML63, 2011 Mercedes-Benz ML550, and 2011 Mercedes-Benz ML350. However, it is still accessible from the selected car via links, so may be relevant.

ENGINE 113.964 in MODEL 164.175

Fig 1: Identifying Oxygen Sensor Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	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 the lifting platform.	Align vehicle between the columns of the and position the four support plates below the lifting platform support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
1	Raise vehicle with lifting platform		AR00.60-P-1000GZ
2	Remove lower engine compartment paneling		AR61.20-P-1105GZ
3	Press connector for left O2 sensor upstream TWC (G3/3x1) and connector for right O2 sensor upstream TWC (G3/4x1) out of the brackets and disconnect
4	Remove left O2 sensor upstream TWC (G3/3) and right O2 sensor upstream TWC (G3/4)	Installation: Coat thread of O2 sensors with hot lubricating paste.
			*BA14.00-P-1001-01A
		Box wrench bit	Fig 2
		Paste	*BR00.45-Z-1005-06A
5	Press connector for left O2 sensor downstream TWC (G3/5x1) and connector for right O2 sensor downstream TWC (G3/6x1) out of the brackets and disconnect
6	Remove left O2 sensor upstream TWC (G3/5) and right O2 sensor upstream TWC (G3/6)	Installation: Coat thread of O2 sensors with hot lubricating paste.
			*BA14.00-P-1001-01A
		Box wrench bit	Fig 2
		Paste	*BR00.45-Z-1005-06A
7	Install in the reverse order
8	Read out fault memory and erase if required
	Connect up STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
		STAR DIAGNOSIS diagnostic system	*WH58.30-Z-1048-13A
	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
9	Carry out engine test run

O2 SENSOR

Number	Designation		Engines 113.940/941/942/943/944/945/946/948/960/961/962/963/964/965/966/967/968/980/981/982/984/986/992/993/995
BA14.00-P-1001-01A	O₂ sensor on exhaust pipe/ exhaust	Nm manifold	55

Fig 2: Identifying Ring Wrench Socket (000 589 71 03 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

COMMERCIALLY AVAILABLE TOOLS

Number	Designation
WH58.30-Z-1048-13A	STAR DIAGNOSIS diagnostic system, Compact Passenger Car	6511 1801 00

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1005-06A	Paste	A 000 989 76 51