The 9G-Tronic transmission service kit for the Mercedes-Benz E-Class W214 contains the oil filter, sump pan gasket, drain plug seal and fluid temperature sensor O-ring. Mercedes-Benz recommends transmission fluid changes every 40,000km for vehicles used in demanding conditions.

1. 1
2. Warm gearbox (20km drive)
3. 2
4. Raise vehicle on hoist
5. 3
6. Remove undertray
7. 4
8. Drain via drain plug — note: 9G-Tronic drain plug is M20 x 1.5
9. 5
10. Remove sump pan bolts (Torx T30) — 19 bolts
11. 6
12. Remove old pan and gasket
13. 7
14. Remove flat filter from valve body
15. 8
16. Install new filter
17. 9
18. Install new gasket and pan
19. 10
20. Torque pan bolts to 9Nm in star pattern
21. 11
22. Refill with MB 236.25 fluid (approx 5L via fill hole)
23. 12
24. Check level at 60°C via overflow.