If you have a Digiprog 3 odometer correction tool, you can do mileage correction on Mercedes Benz W204 (2009)
via OBD within 5 minutes without dissembling the dashboard.
Here let’s check the instruction step by step:
Directly plug Digiprog 3 V4.94 mileage correction tool via OBD diagnostic socket
Power on the device
Enter password (Default power-on password is 1)
Check the mileage on the dashboard
Select “PKW/LKW” at the digiprog3 Main Menu
Then select vehicle make: MERCEDES
Select detail Benz model: W204 C-Class
Select “TACHO DIAG”
The Digiprog mileage correction tool will prompt which adapter should you plug in, here the device prompt to plug ST16 adapter.
Next DigiProg 3 will ask you to manually enter the mileage displayed on the dashboard. Follow the system instruction.
The device is building communication with the vehicle. The new correct mileage will displayed on the dashboard.
Exit the Digirpog 3 device and disconnect it with vehicle.