Hi I will start by explaining my intentions.
I want to do a LED swap mod on my speedo cluster (2004 E53).
I have purchased a used cluster and just want to try and clarify the swap procedure.
Once I have swapped the LED's and installed a blank M35080 chip, can I just plug in the modified cluster and LCM and EWS will update the mileage and VIN in the new blank M35080 automatically?
Or should I do a backup with PA Soft 1.4, then do a restore after I install the new cluster?
I dont want to touch or modify my original cluster and keep it as a backup incase anything goes wrong.
Any help would be appreciated.