How-to: change odometer on A Opel Astra H with Digiprog 3 v4.94 mileage programmer.
Following is the text.
Need to remove dash
Digiprog3 prompts to connect with PLUG 1
Reading old mileage
Manually enter new odometer you desired
Writing new mileage
Go back and select Astra 35080 to check if the mileage has been corrected.
Reinstall instrument cluster back to vehicle.