1. Full resets have to be carried out to remove ALL messages & warnings before carrying on. 
  2. AdBlue needs to be FULL and showing 100% on diagnostic tool. 
  3. Do the reset with Diagnostic tool to get the vehicle running, it will come up with 30mile range on the display, leave the vehicle running for 10 minutes and it will then clear by itself. 
  4. At this point, then install the AdBlue delete file, leave the vehicle locked up for 30 minutes. 
  5. Put ignition then on position 2 and leave for a further 30 seconds before starting. 
  6. Let vehicle idle for 10 minutes till all lights go out. 
  7. Once lights are out, disconnect AdBlue module.