The coolant expansion tank for the Mercedes-Benz E-Class W214 is a complete assembly including the tank body, pressure cap, coolant level sensor and all fittings. Cracking of the tank or sensor failure are common reasons for replacement. This OEM-grade unit matches all connection points exactly.

1. 1
2. Allow engine to cool completely
3. 2
4. Remove engine cover
5. 3
6. Place cloth under tank
7. 4
8. Disconnect coolant level sensor connector
9. 5
10. Loosen hose clamps and remove 3 hoses
11. 6
12. Remove 2 tank mounting bolts
13. 7
14. Remove tank
15. 8
16. Transfer cap to new tank
17. 9
18. Install new level sensor grommet
19. 10
20. Mount new tank
21. 11
22. Reconnect all hoses and sensor
23. 12
24. Fill with MB coolant (50/50 mix)
25. 13
26. Bleed system per service manual.