The OM654 piezo injector for the Mercedes GLC 220d delivers precise multi-pulse injection at up to 2,500 bar. GLC diesel injectors are subjected to high thermal cycles due to the compact engine bay. Failing injectors cause white smoke, rough idle and fuel in oil.

1. 1
2. Relieve fuel rail pressure via XENTRY
3. 2
4. Remove engine cover
5. 3
6. Disconnect return line cap
7. 4
8. Loosen injector clamp bolt (M8 Torx)
9. 5
10. Extract injector with puller
11. 6
12. Install new copper seat washer
13. 7
14. Install new injector
15. 8
16. Reconnect return line
17. 9
18. XENTRY: enter injector coding values from label.