The electric coolant pump for the Mercedes-Benz C-Class W206 with M254 engine operates independently of engine speed, allowing precise coolant flow control by the engine management system. Failure is indicated by coolant warning lights and potential engine overheating. This OEM-spec replacement matches original flow rates and electrical specifications.

1. 1
2. Allow engine to cool completely
3. 2
4. Drain coolant below pump level
5. 3
6. Locate electric pump on lower left of engine
7. 4
8. Disconnect 6-pin electrical connector
9. 5
10. Loosen clamps on inlet and outlet hoses
11. 6
12. Remove 3 mounting bolts (8mm hex)
13. 7
14. Remove pump — have cloth ready for residual coolant
15. 8
16. Install new pump with new gasket
17. 9
18. Reconnect hoses and secure clamps
19. 10
20. Refill coolant and bleed system
21. 11
22. Start engine and check for leaks.