Transmission Cooler: Service and Repair

17 21 020 Removing And Refitting/Replacing Transmission Oil Cooler For Twin-Clutch Gearbox Or Automatic Transmission (N55)







IMPORTANT:
Risk of scalding.
Only perform this repair work after engine has cooled down.







Necessary preliminary tasks:
- Drain coolant.
- Remove underbody protection
- OnlyE84 with pedestrian protection:
Remove pedestrian protection.







Recycling
Catch and dispose of drained coolant in a suitable container.
Transmission oil emerges when engine oil lines are detached from transmission oil cooler.
Catch and dispose of escaping transmission oil in a suitable container.
Observe country-specific waste disposal regulations.







Release and disconnect coolant hoses (1).
Unlock transmission oil lines (2) and detach.
Release screw (3).
Tightening torque 17 10 6AZ.
Remove transmission oil cooler (4).







NOTE:
Assemble engine.
Check oil level in twin-clutch gearbox. Top up gearbox oil if necessary.