Need some help with my ecu (e39)

[kainemoistus]

So long story short, bought a car which has an absolutely butchered tune on it presumably.

The car itself is a 2001 E39 525d m57. I am wondering if there is a possibility to retrieve the original map  somehow. And also i am willing to learn the way to extract the ecu file. I have the k+dcan cable, inpa, ista, etc software. 

One possibility would be that someone smarter than me shows me how to extract the file, corrects it with egr off etcetc and sends it back to me for me to flash it. I will pay for the service. Shoot me a dm. 


Thanks a bumch.