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Remove/Install Oxygen Sensor Downstream Of Catalytic Converter - AR07.04-P-0085MRD

Engine 274.9 in model 213 

Engine 274.9 in model 238 

Fig 1: Oxygen Sensor Downstream Of Catalytic Converter Components Location - Engine 274.9 In Model 213
G13744454WARNINGREMOVINGINSTALLINGINSTALLATION IMPORTANTTORQUE SPECIFICATIONSPECIAL TOOLSPECIAL TOOLSPECIAL TOOLREFER TO SELF-DIAGNOSTIC SYSTEMSREFER 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
  Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
  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 air filter housing. Engine 274.9 in model 213 with code 920 (Direct fuel injection with stratified charging)
Engine 274.9 in model 238 with code 920 (Direct fuel injection with stratified charging)
AR09.10-P-1150MRD
2 Release and disconnect electrical connector (4).    
3 Unclip electric line of the lambda sensor (3) from the bracket.    
4 Remove lambda sensor (3) and seal threaded hole in the catalytic converter using a suitable stop plug. INSTALLATION IMPORTANT Coat thread with hot lubrication paste.
TORQUE SPECIFICATION Oxygen sensor to catalytic converter
*BA14.00-P-1002-01A 
    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 2
5 Cover lambda sensor (3) with protective cover. When oxygen sensor (3) is reused.  
    SPECIAL TOOL Set of protective caps Fig 3
6 Install in the reverse order.    
7 Read out and delete fault memory.    
REFER TO SELF-DIAGNOSTIC SYSTEMS   Engine 274.9 in model 213 AD00.00-P-2000-04B
REFER TO SELF-DIAGNOSTIC SYSTEMS   Engine 274.9 in model 238 AD00.00-P-2000-06LWO
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 engine for proper operation and check exhaust system for leak tightness.    
OXYGEN SENSOR

Number Designation Engine 274
BA14.00-P-1002-01A Oxygen sensor to catalytic converter Nm 50
Fig 2: Identifying Box Wrench Bit (000 589 71 03 00)
G07694428Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Set Of Protective Caps (001 589 00 91 00)
G12079434Courtesy 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