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Home >> Mercedes Benz >> 2017 >> GLS63 AMG >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Complete Engine - 166 Chassis 1 Of 2 >> Testing & Repair >> Disconnect Engine Wiring Harness >> Disconnect Engine Wiring Harness - AR01.00-P-2410-02MLJ

Disconnect Engine Wiring Harness - AR01.00-P-2410-02MLJ

Engine 157, 278 in model 166 

Engine 157, 278 in model 292 

BATTERY

Number Designation Model 166 Model 292
BA54.10-P-1002-01C Nut, circuit 30 in prefuse box Nm 15 15
G14131169Courtesy of MERCEDES-BENZ USA
G14131170Courtesy of MERCEDES-BENZ USA
  1. Remove cover (20) under front passenger seat.
  2. Detach ground line (21) from on-board electrical system battery (G1) and place to one side.

    IMPORTANT Insulate connecting point for ground line (21) to avoid unintended contact of detached ground line (21) with the on-board electrical system battery (G1) ground point.

    G11972631Courtesy of MERCEDES-BENZ USA
    G11974958Courtesy of MERCEDES-BENZ USA
  3. Remove engine air intake duct (2) upstream of air filter.
  4. Disconnect electrical connection (7) for transmission wiring harness and unclip at shield (22) for high-pressure pump.
  5. Remove air inlet box upper section on the right (7.1).
  6. Remove cover from prefuse box.
  7. Open cable duct on suspension strut support fastening console.
  8. Detach alternator/starter wiring harness (5) and electric steering wiring harness (6) on prefuse box TORQUE SPECIFICATION
  9. Disconnect electrical connection (4) for electric steering.
  10. Unclip wiring harness (5, 6) on fuse box and on longitudinal member reinforcement at the front.
  11. Detach ground line for electric steering on longitudinal member reinforcement at the front.
  12. Pass wiring harnesses (5, 6) between suspension strut support mounting console and fuse box and lay on engine.
  13. Detach electrical connection (12) on cylinder head cover and disconnect.
  14. Disconnect electrical connection (8, 9) on ME-SFI [ME] control unit and place to one side.
  15. Disconnect electrical connections on left intake camshaft solenoid (Y49/4) and on left exhaust camshaft solenoid (Y49/6) or right intake camshaft solenoid (Y49/5) and on right exhaust camshaft solenoid (Y49/7).
  16. Disconnect electrical connections on left intake camshaft Hall sensor (B6/4) and on left exhaust camshaft Hall sensor (B6/6) or right intake camshaft Hall sensor (B6/5) and on right exhaust camshaft Hall sensor (B6/7).
  17. Disconnect electrical connections at the ignition coils (T1).
  18. Disconnect electrical connections to fuel injectors (Y76).
  19. Disconnect electrical connection at boost pressure control pressure transducer (Y77/1).
  20. Disconnect electrical connection on coolant thermostat heating element (R48) and unclip on cover at front left.
  21. Disconnect electrical connection at A/C compressor (A9).
    G11974959Courtesy of MERCEDES-BENZ USA
  22. Detach ground line (24) from cylinder head cover.
  23. Disconnect electrical connection on fuel pressure and temperature sensor (B4/25).
  24. Detach engine wiring harness (21) on the rail.

    INSTALLATION IMPORTANT : Ensure correct seating of the holding clip (23) on the rail.

  25. Detach guide rail (25) for engine wiring harness (21) on the cylinder head cover and the intake manifold.
  26. Lay engine wiring harness (21) aside.
    G11974960Courtesy of MERCEDES-BENZ USA