As titled, here we successfully change odometer on a Mercedes Benz W204 C-class mileage using Super DSPIII+ OBD tool via OBD.
Original odometer: 191052 miles
Connect DSPIII host with vehicle via OBD socket through OBD adapter
Select Odometer->Benz->W204 DIAG
Loading program
Select mileage unit: km or mile, here we choose mile
Reading mileage
Super DSP3 will read mileage in both km and mile
Enter the mileage you desired, and press Write KM
NOTE: If you are not familiar with this procedure, please check another detail example: Audi A3 2014 NEC35XX mileage correction via OBD
Odometer correction success
Check the new mileage on dashboard: 178156 miles
Done.