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Remove/Install Oxygen Sensor Upstream Of Catalytic Converter - AR07.04-P-0086MRI

Engine 264 in Model 205, 253 

Fig 1: Oxygen Sensor Upstream Of Catalytic Converter Components Location - Engine 264 in Model 205
G14180817WARNINGREMOVINGINSTALLINGINSTALLATION IMPORTANTINSTALLATION IMPORTANTTORQUE SPECIFICATIONSPECIAL TOOLSPECIAL TOOLSPECIAL TOOLREFER TO SELF-DIAGNOSTIC SYSTEMSWARNINGCourtesy of MERCEDES-BENZ USA
WARNING Risk of burn injuries  , suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust.
Risk of poisoning  caused by skin contact with solid components of the exhaust.
Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area. AS49.00-Z-0001-01A
Topical note Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
Topical note Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
  Note on calculation of tightening torque when using insertion or socket tools with various effective lengths   AH00.00-P-0015-01CW
REMOVINGINSTALLING Remove/Install     
1 Remove Engine cover. INSTALLATION IMPORTANT
Only install Engine cover after the leak test.
AR01.10-P-2405MRI
2 Release electrical connector(1) and disconnect.    
3 Unclip lambda sensor electric line upstream of the catalytic converter (G3/2) from the bracket (2).    
4 Remove lambda sensor upstream of catalytic converter(G3/2) and seal threaded hole in catalytic converter with suitable stop plug. INSTALLATION IMPORTANT
Coat thread with hot lubrication paste.
 
TORQUE SPECIFICATION
Oxygen sensor upstream of catalytic converter
*BA14.00-P-1001-02C 
Paste, hot lubrication 1 kg, DBL 6879.20 *BR00.45-Z-1005-06A 
SPECIAL TOOL
Record plug
Fig 4
SPECIAL TOOL
Box wrench bit
Fig 3
5 Seal lambda sensor upstream of the catalytic converter (G3/2) with protective cover. When the oxygen sensor upstream of catalytic converter (G3/2) is reused.  
SPECIAL TOOL
Set of protective caps
Fig 2
6 Install in the reverse order.    
7 Read out and delete fault memory.    
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04B
WARNING Risk of accident  from vehicle starting off by itself when Engine running.
Risk of injury  (bruises and burns) resulting from working on the Engine while it is being started or when it is running.
Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. AS00.00-Z-0005-01A
8 Perform an Engine test run; check the Engine for proper operation and the exhaust system for leaks.    
9 Install Engine cover.   AR01.10-P-2405MRI
OXYGEN SENSOR

Number Designation Engine 264
BA14.00-P-1001-02C Oxygen sensor upstream of catalytic converter Nm 50
Fig 2: Identifying Set Of Protective Caps (001 589 00 91 00)
G12079434Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Box Wrench Bit (000 589 71 03 00)
G13845382Courtesy of MERCEDES-BENZ USA
Fig 4: Identifying Record Plug (129 589 00 91 00)
G11065549Courtesy of MERCEDES-BENZ USA
REPAIR MATERIALS

Number Designation Order number
BR00.45-Z-1005-06A Paste, hot lubrication 1 kg, DBL 6879.20 A 000 989 76 51