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Home >> Mercedes Benz >> 2021 >> GT 53 AMG >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Electrical System -- Engine -- 290 Chassis >> Testing & Repair >> Disconnect/Connect Engine Wiring Harness To Remove Engine >> Disconnect/Connect Engine Wiring Harness To Remove Engine - AR15.18-P-1000-05MNI

Disconnect/Connect Engine Wiring Harness To Remove Engine - AR15.18-P-1000-05MNI

Engine 177 in model 290 

GROUND POINTS

Number Designation Model 290
BA00.19-P-1039-02D Bolt/nut, ground line to transmission/underfloor M8 Nm 20
WIRING HARNESS

Number Designation Model 290
BA54.18-P-1001-02C Nut, positive line to busbar on firewall M6 Nm 8
M8 Nm 17
  1. Release and disconnect electrical connections (1).
  2. Unclip holder (2).
  3. Remove heat shield in front of cover (3).
  4. Remove cover (3).
  5. Remove electric line (4) from busbar TORQUE SPECIFICATION
  6. Remove electric line (5) from busbar TORQUE SPECIFICATION .
  7. Remove electric line (6) from busbar TORQUE SPECIFICATION .

    Shown on engine 177.9 

    G16559285Courtesy of MERCEDES-BENZ USA
  8. Release and disconnect electrical connectors (7).
  9. Unclip retaining clips (8)
  10. Release and disconnect electrical connector (10).
  11. Release and disconnect electrical connector (11) of all-wheel drive control unit (N45) and remove electric line from the rear engine carrier.
  12. Remove transmission (9) ground line (13) from underbody TORQUE SPECIFICATION .
    1. Engine 177.9 in model 290

      Release and disconnect electrical connectors (12).

    2. Engine 177.8 in model 290 with code ME10 (Hybrid vehicle (plug-in, PHEV))

      Release and disconnect electrical connectors of high-voltage wiring harness and remove high voltage wiring harness from holders and front axle carrier.

  13. Connect in reverse order.

    Shown on engine 177.9 

G16559286Courtesy of MERCEDES-BENZ USA