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Home >> Mercedes Benz >> 2020 >> SLC43 AMG Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Complete Engine - 172 Chassis >> Testing & Repair >> Disconnect Engine Wiring Harness For Removal Of Cylinder Head Covers - AR01.00-P-2410-04WA

Disconnect Engine Wiring Harness For Removal Of Cylinder Head Covers - AR01.00-P-2410-04WA

Engine 276.8 in model 172 

G13841657Courtesy of MERCEDES-BENZ USA
  1. Release and disconnect electrical connections (1) for ignition coils.
  2. Detach electrical wiring harness for ignition coils from left rail.
  3. Detach electrical wiring harness for ignition coils from right rail.
  4. Release and disconnect electrical connections (5).
  5. Unclip wiring harness (4) at right cylinder head cover.
  6. Unclip engine wiring harness (3) at left and right cylinder head cover.
  7. Unclip engine wiring harness (3) at left and right timing case cover.
  8. Release and disconnect electrical connection (8) at pressure sensor.
  9. Release and disconnect electrical connections (2).
  10. Release and disconnect electrical connections (6).
  11. Release and disconnect electrical connection (7).
    G13841658Courtesy of MERCEDES-BENZ USA
  12. Disconnect electrical connection (9).
  13. Unclip electrical line (10) at low-temperature circuit coolant expansion reservoir carrier.
  14. Release and disconnect electrical connection (11).
  15. Release and disconnect electrical connections (12).
  16. Release and disconnect electrical connection (13).
  17. Unclip electrical line from pressure sensor upstream of throttle valve at low-temperature circuit coolant expansion reservoir carrier.
  18. Release and disconnect electrical connection (14).
  19. Release and disconnect electrical connection (15).
  20. Unclip electrical wiring harness (18) at left front cover.
  21. Release and disconnect electrical connection (17).
  22. Release and disconnect electrical connection (16).
    G13841659Courtesy of MERCEDES-BENZ USA
  23. Remove screw/bolts (19).
  24. Lift cable duct (20) and place to one side.