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Home >> Mercedes Benz >> 2021 >> CLS450 Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electrical System - Engine - 257 Chassis >> Testing & Repair >> Remove/Install Fuel Injection System Engine Wiring Harness - AR15.18-P-0003MSA

Remove/Install Fuel Injection System Engine Wiring Harness - AR15.18-P-0003MSA

Engine 256.9 in model 213, 238, 257, 290 

Fig 1: Fuel Injection System Engine Wiring Harness Component Location - Model 257 With Engine 256.9
G14548264REMOVINGINSTALLINGIMPORTANTTORQUE SPECIFICATIONTORQUE SPECIFICATIONINSPECTREFER TO SELF-DIAGNOSTIC SYSTEMSREFER TO SELF-DIAGNOSTIC SYSTEMSREFER TO SELF-DIAGNOSTIC SYSTEMSCourtesy of MERCEDES-BENZ USA
Topical note Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Disconnect ground line from battery Engine 256.9 in model 213 AR54.10-P-0003LW
    Engine 256.9 in model 238 AR54.10-P-0003LWO
    Engine 256.9 in model 257, 290 AR54.10-P-0003FR
2 Remove oil separator (4).   AR01.20-P-9750MSA
3 Remove engine air intake duct downstream of air filter.   AR09.10-P-8130MSA
4 Remove rear noise insulation.    
5 Release and disconnect electrical connectors (2).    
6 Remove air filter housing.   AR09.10-P-1150MSA
    IMPORTANT The ME-SFI control unit (N3/10) remains on the air filter housing.  
7 Remove engine wiring harness (1) from the cable duct (3).    
8 Remove potential distributor from the cylinder head cover. TORQUE SPECIFICATION Screw, engine wiring harness potential distributor to camshaft housing *BA15.18-P-1003-01MRT 
9 Remove engine wiring harness (1) from cylinder head cover and rail. TORQUE SPECIFICATION Screw, engine wiring harness cable duct to camshaft housing *BA15.18-P-1002-01MRT 
10 Remove cable duct (5) from engine wiring harness (1).    
11 Release and disconnect electrical connectors of the fuel injectors (Y76/1, Y76/2, Y76/3, Y76/4, Y76/5, Y76/6).    
12 Unclip engine wiring harness (1) and remove.    
13 Install in the reverse order.    
INSPECT Check     
14 Read out and delete fault memory.    
REFER TO SELF-DIAGNOSTIC SYSTEMS   Engine 256.9 in model 213 AD00.00-P-2000-04B
REFER TO SELF-DIAGNOSTIC SYSTEMS   Engine 256.9 in model 238 AD00.00-P-2000-06LWO
REFER TO SELF-DIAGNOSTIC SYSTEMS   Engine 256.9 in model 257, 290 AD00.00-P-2000-06FR
12 V ON-BOARD ELECTRICAL SYSTEM ENGINE WIRING HARNESS

Number Designation Engine 256
BA15.18-P-1002-01MRT Screw, engine wiring harness cable duct to camshaft housing Nm 8
12 V ON-BOARD ELECTRICAL SYSTEM ENGINE WIRING HARNESS

Number Designation Engine 256
BA15.18-P-1003-01MRT Screw, engine wiring harness potential distributor to camshaft housing Nm 8