LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mercedes Benz >> 2012 >> ML63 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Ignition System >> Mixture Formation - 166 Chassis - 2 Of 4 >> Testing & Repair >> Remove/install O2 sensor >> Remove/install O2 sensor - AR07.04-P-0080OGR
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Remove/install O2 sensor - AR07.04-P-0080OGR

ENGINE 642 in MODEL 166 

Fig 1: Identifying O2 Sensor Remove/Install Components
G09981610Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
DANGER Risk of injury  . Skin or eye injuries may result when handling hot or glowing objects. Wear protective gloves, protective clothing and safety glasses, if necessary. AS00.00-Z-0002-01A
1 Open engine hood and move to vertical position   AR88.40-P-1000GQ
2 Remove upper engine cover INSTALLATION IMPORTANT Only install upper engine cover after an engine test run and leak test.  
3 Remove right section of the bulkhead    
4 Remove heat shield of turbocharger    
5 Disconnect electrical connection (G3/2x1) IMPORTANT Remove electrical connection (G3/2x1) from bracket and expose electrical line.  
6 Remove oxygen sensor (G3/2) INSTALLATION IMPORTANT Coat thread of the oxygen sensor (G3/2) with heat-resistant lubricant.  
TORQUE SPECIFICATION Control sensor upstream of catalytic converter *BA14.00-P-1003-01F 
Paste, hot lubrication 1 kg, DB supply specification 6879.20 *BR00.45-Z-1005-06A 
7 Install in the reverse order    
INSPECT Check     
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 Do an engine test run and check for leaks    
O2 SENSOR

Number Designation ENGINE 642
BA14.00-P-1003-01F Control sensor upstream of catalytic converter Nm 50
REPAIR MATERIALS

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