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

ENGINE 276.8 in MODEL 217, 222 

Fig 1: Heated O2 Sensor Remove/Install Components (1 Of 2)
G11131996Courtesy of MERCEDES-BENZ USA
Fig 2: Heated O2 Sensor Remove/Install Components (2 Of 2)
G11131997DANGERREMOVINGINSTALLINGINSTALLATION IMPORTANTINSTALLATION IMPORTANTTORQUE SPECIFICATIONTORQUE SPECIFICATIONSPECIAL TOOLREFER TO SELF-DIAGNOSTIC SYSTEMSDANGERCourtesy of MERCEDES-BENZ USA
DANGER Risk of death  caused by vehicle slipping or toppling off of the lifting platform. Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer. AS00.00-Z-0010-01A
REMOVINGINSTALLING Remove/install     
1 Remove engine compartment paneling   AR61.20-P-1105LF
2 Remove bracket for the CATs at transmission   AR49.10-P-7100LF
3 Disconnect electrical connection (G3/3x1, G3/4x1, G3/5x1, G3/6x1) of oxygen sensors (G3/3, G3/4, G3/5, G3/6)    
4 Unclip electrical lines for oxygen sensors (G3/3, G3/4, G3/5, G3/6) from retaining clamps (3) and brackets    
5 Remove oxygen sensors (G3/3, G3/4, G3/5, G3/6) INSTALLATION IMPORTANT Coat thread with heat-resistant lubricant.
INSTALLATION IMPORTANT Ensure correct routing of the lines of the oxygen sensors (G3/3, G3/4, G3/5, G3/6).
Paste, hot lubrication 1 kg, DBL 6879.20
*BR00.45-Z-1005-06A 
    TORQUE SPECIFICATION Oxygen sensor upstream of catalytic converter *BA14.00-P-1005-01A 
    TORQUE SPECIFICATION Oxygen sensor at catalytic converter *BA14.00-P-1002-01A 
    SPECIAL TOOL Box wrench bit Figure
6 Install in the reverse order    
7 Read out fault memory using the diagnostic system and clear if necessary    
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04B
DANGER 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 Carry out an engine test run and check exhaust system for leaktightness    
OXYGEN SENSOR

Number Designation Engine 276
BA14.00-P-1002-01A Oxygen sensor at catalytic converter Nm 50
OXYGEN SENSOR

Number Designation Engine 276
BA14.00-P-1005-01A Oxygen sensor upstream of catalytic converter Nm 50
Fig 3: Identifying Box Wrench Bit (000 589 71 03 00)
G07694428Courtesy 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