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Home >> Mercedes Benz >> 2021 >> GLC300 Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electrical System - Engine - 253 Chassis >> Testing & Repair >> Check Regulator And Alternator - AR15.40-P-5000CW
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Check Regulator And Alternator - AR15.40-P-5000CW

Engine 156, 271, 272, 273, 274, 276, 278, 642, 651 in model 212 

Engine 156, 271, 272, 274, 642, 646, 651 in model 204 

Engine 271, 272, 273, 642, 651 in model 207 

Engine 271, 651 in model 172 

Engine 274 in model 172 

Engine 274 in model 205 (except 205.047/147/247), 253 (except 253.354/954) 

Engine 274, 651 in model 218 

Engine 642 in model 292 

Engine 651 in model 166 

Engine 651 in model 221 

Shown on MODEL 212.002 

G12937514Courtesy of MERCEDES-BENZ USA
INSPECT Check     
1 Check the condition of battery and replace if necessary Engine 642 in model 292
Engine 651 in model 166
AR54.10-P-1129GZ
    Engine 271, 651 in model 172
Engine 274 in model 172
AR54.10-P-1129V
    Model 204 with Engine 156, 271, 272, 274, 642, 646, 651
Model 207 with Engine 271, 272, 273, 642, 651
Model 212 with Engine 156, 271, 272, 273, 274, 276, 278, 642, 651
Model 218 with Engine 274, 651
AR54.10-P-1129CW
    Model 221.0/1 up to 6/1/08 with Engine 651
except code 809 (Model year 2009)
AR54.10-P-1129SX
    Model 221.0/1 as of 6/2/08 with Engine 651 with code 809 (Model year 2009) AR54.10-P-1129SY
    Engine 274 in model 205 (except 205.047/147/247)
except code P25 (BlueEFFICIENCY Edition)
except code U98 (LITHIUM-IONEN-STARTERBATTERIE (LISB))
Engine 274 in model 253 (except 253.354/954)
except code U98 (LITHIUM-IONEN-STARTERBATTERIE (LISB))
AR54.10-P-1129LW
2 Attach diagnostic system (0100) at diagnostic connector (X11/4)    
REFER TO SELF-DIAGNOSTIC SYSTEMS   Engine 156, 271, 272, 273, 274, 276, 278, 642, 651 in model 212
Engine 156, 271, 272, 274, 642, 646, 651 in model 204
Engine 271, 272, 273, 642, 651 in model 207
Engine 271, 651 in model 172
Engine 274 in model 172
Engine 274, 651 in model 218
Engine 642 in model 292
Engine 651 in model 166
Engine 651 in model 221
AD00.00-P-2000-04A
REFER TO SELF-DIAGNOSTIC SYSTEMS   Engine 274 in model 205 (except 205.047/147/247), 253 (except 253.354/954) 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
3 Start the Engine and check alternator with diagnostic system (0100)    
4 Turn off Engine    
5 Disconnect diagnostic system (0100)    
REFER TO SELF-DIAGNOSTIC SYSTEMS   Engine 156, 271, 272, 273, 274, 276, 278, 642, 651 in model 212
Engine 156, 271, 272, 274, 642, 646, 651 in model 204
Engine 271, 272, 273, 642, 651 in model 207
Engine 271, 651 in model 172
Engine 274 in model 172
Engine 274, 651 in model 218
Engine 642 in model 292
Engine 651 in model 166
Engine 651 in model 221
AD00.00-P-2000-04A
REFER TO SELF-DIAGNOSTIC SYSTEMS   Engine 274 in model 205 (except 205.047/147/247), 253 (except 253.354/954) AD00.00-P-2000-04B