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Remove/install injection system control unit - AR07.08-P-7008MT

ENGINE 133 in MODEL 117, 156, 176 

ENGINE 270 in MODEL 117, 156, 176, 242, 246.2 

ENGINE 270 

Fig 1: Injection System Control Unit Remove/Install Components - Engine 270
G10250168Courtesy of MERCEDES-BENZ USA

ENGINE 133 

Fig 2: Injection System Control Unit Remove/Install Components - Engine 133
G10250169NOTESREMOVINGINSTALLINGREFER TO SELF-DIAGNOSTIC SYSTEMSIMPORTANTINSTALLATION IMPORTANTIMPORTANTIMPORTANTREFER TO SELF-DIAGNOSTIC SYSTEMSIMPORTANTDANGERCourtesy of MERCEDES-BENZ USA
NOTES Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Read out variant coding of the ME-SFI [ME] control unit (N3/10) with diagnostic system When replacing the ME-SFI [ME] control unit (N3/10).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04A
IMPORTANT Connect up diagnostic system and read data from ME-SFI [ME] control unit (N3/10) into Star Diagnosis.
INSTALLATION IMPORTANT Transfer stored data to new ME-SFI [ME] control unit (N3/10).
 
2 Switch off ignition    
3 Remove battery cover (5) ENGINE 133 in MODEL 117, 156, 176  
4 Expose electrical wiring harness (6) at air filter housing (4) and place to one side ENGINE 133 in MODEL 117, 156, 176
IMPORTANT Do not disconnect electrical connection (7).
 
5 Disconnect electrical connections (1, 2) on ME-SFI control unit (N3/10)    
6 Open retaining clamps (3) and remove ME-SFI [ME] control unit (N3/10) from air filter housing (4) IMPORTANT Check seal between air filter housing (4) and ME-SFI [ME] control unit (N3/10) for damage and replace if necessary.  
7 Install in the reverse order    
8 Perform sensor rotor adaptation with diagnostic system When replacing the ME-SFI [ME] control unit (N3/10).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04A
IMPORTANT Menu guidance:
  • Engine control unit
  • Adaptations
  • Teach-in processes
 
9 Release transport protection on ME-SFI [ME] control unit (N3/10) When replacing the ME-SFI [ME] control unit (N3/10).  
10 Personalize and activate ME-SFI [ME] control unit (N3/10) When replacing the ME-SFI [ME] control unit (N3/10).  
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
11 Carry out an engine test run