Haldex Oil Change

1. Remove Fill Plug (5mm Allen Head), be sure it can be filled after fluid is drained.
2. Remove Drain Plug (8mm Allen Head), drain all fluid.
3. Disconnect Haldex Pump Connector from Haldex Controller. If it's difficult, unbolt the Haldex Controller (2x Torx/10mm Hex bolt).
4.  Loosen the Pump Harness Guide (2 push-in clips).
5. Remove Haldex Pump (2x 10mm Hex). Jiggle a bit to remove it. Take care of rubber O-rings.
6.  Remove Filter from pump. Clean it with compressed air.
7.  Clean Pump and Pump Seat in Diff Housing.
8. Inspect O-Rings, put some Haldex Oil on.
9. Reinstall Pump, Harness, Plug in Connector and reinstall Haldex Controller.
10. Check Drain Plug Gasket (copper). Replace if damaged. Reinstall Drain Plug, torque to 32Nm.
11. Fill Haldex assembly via Fill Plug hole with Haldex Oil (Ravenol AWD-H). Pump until fluid pours out. Approx. 0,95L.
12. Install Fill Plug, check copper gasket. Torque to 15Nm.
13. Plug in OBD connector and start RossTech VCDS
14. Select '22 – AWD', select 'Basic Settings – 04'
Select 'MAS02928 – Pump Motor' from the drop-down menu
Select 'Go'
15. The pump starts and calibration is done automatically. Wait until 'Finished Correctly' is displayed.
 
  1=Fill Plug, 2=Drain Plug
   
  Useful link: https://www.jcr-leeds.com/haldex-servicing-gen5/