Original OBDSTAR X300DP is the advanced tablet which program immo and does some special functions like program ECU , read Pin code, adjust Mileage etc. Here is the test demo on Cadillac ATS 2016 odometer correction via X300 DP in easy 3 steps.
Connect OBDSTAR X300 DP with vehicle and power on device
Press on START button
Choose “Mileage adjust” option and click on GM brand
Select GM software version
Choose car model: Cadillac
Choose ATS 2013-
Select mileage correction
It is communicating…
OBDSTAR X300 DP tablet will display the current mileage information
Input the new mileage and press ENTER to continue, i.e 3061
Confirm new mileage entered
Communicating…
Mileage correction succeed
Done!