Disconnect/Connect Engine Wiring Harness To Remove Cylinder Head Cover - AR15.18-P-1000-04MFC

Engine 260 in model 118, 177, 247 

Replace mounting materials if necessary. Install all lines along original attachment points.

Courtesy of MERCEDES-BENZ USA

1. Remove cap from cable duct (1).
2. Release and disconnect electrical connector at purge control valve (Y58/1).
3. Engine 260 in model 177 with code 460 (Canada version)

   Engine 260 in model 177 with code 494 (US version)

   Engine 260 in model 177 with code 835 (South Korea version)

   Engine 260 in model 177 with code 945 (China Stage 6 exhaust treatment)

   Release and disconnect electrical connector at purging pressure sensor (B4/4) from purge control valve (Y58/1).

4. Release and disconnect electrical connector at partial-load operation crankcase ventilation valve (5).
5. Release and disconnect line (4) at charge air pipe.
6. Unclip partial-load operation crankcase ventilation valve (5) from cable duct and place to one side with connected lines.

   Do not crush or kink or subject lines to tension.

   This would lead to damage to the lines and can impair their function.

7. Release and disconnect electrical connector at pressure sensor upstream of throttle valve (B28/6).
8. Unclip engine wiring harness (6) at bracket (3) from charge-air distributor.

   Do not crush or kink or subject lines to tension.

   This would lead to damage to the lines and can impair their function.

9. Release and disconnect electrical connector at pressure sensor downstream of throttle valve (B28/7).
10. Release and disconnect electrical connector at pressure sensor downstream of air filter (7).
11. Release and disconnect electrical connector at exhaust camshaft Hall sensor (B6/16).
12. Release and disconnect electrical connector at intake camshaft Hall sensor (B6/15).
13. Release and disconnect electrical connector at intake camshaft adjustment solenoid (Y49/1).
14. Release and disconnect electrical connector at exhaust camshaft adjustment solenoid (Y49/2).
15. Release and disconnect electrical connectors at ignition coils for cylinders 1 to 4 (T1/1 to T1/4).
16. Release and disconnect electrical connectors at fuel injectors for cylinders 1 to 4 (Y76/1 to Y76/4).
17. Release and disconnect electrical connector at intake camshaft valve lift adjustment actuator (Y49/8).
18. Release and disconnect electrical connection at fuel pressure and temperature sensor (B4/25).
19. Release and disconnect electrical connector at quantity control valve (Y94).
20. Remove nut at engine ground point (W2/8)
21. Unclip engine wiring harness (6) along attachment points.

    Do not crush or kink or subject lines to tension. This would lead to damage to the lines and can impair their function.

22. Remove screws (2) from line duct (1) at cylinder head.
23. Lift engine wiring harness (6) out of cable duct (1) and remove cable duct (1).

    Do not crush or kink or subject lines to tension. This would lead to damage to the lines and can impair their function.

24. Place engine wiring harness (6) to one side.
25. Connect in reverse order.