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Home >> Mercedes Benz >> 2019 >> C300 4Matic, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 318 (Electrical System - Engine - 253 Chassis) >> Testing & Repair >> Disconnect/Connect Engine Wiring Harness To Remove Engine >> Disconnect/Connect Engine Wiring Harness To Remove Engine - AR15.18-P-1000-05MRC

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

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Engine 274.9 in model 205 with transmission 716.7 

Engine 274.9 in model 205 with transmission 725.0 

Engine 274.9 in model 253 with transmission 716.7 

Engine 274.9 in model 253 with transmission 725.0 

METRIC SCREWS/BOLTS AND NUTS AS PER MBN 10 105, 10 143

Number Designation 8.8 10.9
BA00.10-P-1002-04A M6 X 1 Nm 9 13
GROUND POINTS

Number Designation Model 205 up to model year 2019 Model 205 as of model year 2019
BA00.19-P-1043-01E Nut, ground line to pin/underfloor M8 Nm 20 20
GROUND POINTS

Number Designation Model 253 (except 253.99)
BA00.19-P-1043-01E Nut, ground line to pin/underfloor M8 Nm 20
WIRING HARNESS

Number Designation Model 205 Model 253
BA54.18-P-1001-02C Nut, positive line to busbar on firewall M6 Nm 8 8
M8 Nm 16 16
G12817193Courtesy of MERCEDES-BENZ USA
  1. Release and disconnect electrical connection (7).
  2. Release and disconnect electrical connection (6).
  3. Unclip wiring harness (5) from charge air cooler and Engine management control unit holder and place to one side.
  4. Detach electrical line (3) from busbar TORQUE SPECIFICATION .
  5. Engine 274.9 in model 205 (except 205.048/049/148/248/348/349/448/449) with transmission 725.0

    Engine 274.9 in model 253 (except 253.349/948/949) with transmission 725.0

    Engine 274.9 in model 253 (except 253.349/949) with transmission 716.7

    Detach electrical line (1) from busbar TORQUE SPECIFICATION .

  6. Detach electrical line (2) from busbar TORQUE SPECIFICATION .
  7. Detach electrical line (4) from busbar TORQUE SPECIFICATION .
  8. Detach ground line (12) from underfloor TORQUE SPECIFICATION .
  9. Detach heat shield (13) from transmission TORQUE SPECIFICATION .
  10. Release and disconnect electrical connection (15).
  11. Engine 274.9 in model 205 with transmission 716.7 Engine 274.9 in model 253 with transmission 716.7 Release and disconnect electrical connection from neutral position encoder.
  12. Connect in reverse order.
G12817194Courtesy of MERCEDES-BENZ USA