W204 petrol 716.6 gearbox — MERCEDES-BENZ

🧭 Before you start

Remove the lower covers, front exhaust and catalytic converter, then disconnect the clutch line, sensors, shift rod, earth cable and propeller shaft. Support engine and gearbox, remove the rear cross member and the engine-to-gearbox bolts and lower the gearbox out. Refit in reverse, bleed the hydraulic clutch circuit and check the gearbox fluid level.

Fits: platform codes 180, CGI, -T, -COUPE, |, KOMPRESSOR, BLUEEFF, 200, 230, 4MATIC, 250, 280, 300

• Opens: brake fluid, clutch fluid

Don't miss

• Mark the propeller shaft position relative to the gearbox flange before separating them.
• Renew the self-locking nuts on the propeller shaft joint.
• Plug the ends of the hydraulic clutch lines as soon as they are disconnected.
• Bleed the clutch with a brake fluid replacement unit, pumping until no bubbles come out.
• Check the gearbox fluid level once the gearbox is back in.

Written for this job from the workshop steps below · TorqFix editorial.

🔧 Engine codes this applies to

📐 16 workshop diagrams for 271.820

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

Preparation and removal

1. Disconnect the battery earth cable
2. Support the front of the vehicle
3. Remove the engine lower covers
4. Disconnect the oxygen sensor(s)
5. Remove the front exhaust pipe with catalytic converter

6. Remove the engine covers
7. Remove the clutch housing screen
8. Gearbox earth cable:
9. Disconnect the earth cable from the gearbox
10. Disconnect the reversing light switch
11. Disconnect the neutral position sensor
12. Oxygen sensor
13. Disconnect the lines from the clutch slave cylinder
14. Drain the hydraulic clutch
15. Note: Plug the ends of the hydraulic lines
16. Support the gearbox
17. Remove the rear cross member
18. Mark the propeller shaft position
19. Disconnect the propeller shaft from the gearbox
20. Renew the self-locking nuts
21. Disconnect the gear-shift rod from the gearbox
22. Support the engine
23. Remove the engine to gearbox bolts
24. Lower the gearbox slightly
25. Remove the gearbox

Installation and checks

26. Check the gearbox fluid level
27. - Bleeding the hydraulic circuit
28. Remove the brake fluid reservoir cap
29. Connect the brake fluid replacement unit
30. Open the bleed screw
31. Pump the clutch pedal repeatedly
32. Until no bubbles come out
33. Close the bleed screw
34. Release the clutch pedal
35. Tighten the bleed screw(s)
36. Lower the vehicle
37. Switch off the brake fluid replacement unit
38. Disconnect the brake fluid replacement unit
39. Reconnect the clutch hydraulic line

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