How-to’s:OBDSTAR X300 Key Master DP odometer reset for 2011 Mercedes-Benz C200 W204
Video demo:
Procedures:
Plug the VCI connector between the obd port and X300 DP PAD.
Power on the X300 PAD tablet.
The old mileage:6204 miles
Select “Diag Program” option on the menu.
Select the “Mileage Adjustment” option
Select “Benz”
Select “BENZ V30.19” software
C series–>W204,then tap “Ok”
OBDSTAR X300 DP will prompt you to turn ignition on.
Turn the ignition
Select “OK” to continue
Reading mileage…
It prompt that “Current mileage :9984km”,select “OK” to continue
Then input the number that you want mileage value,there i enter 4000,and then tap “Done”–>”OK”
Writing data…
Modifying mileage… 
Adjustment complete 
Note:there the new number 2485 miles=4000km(we input before)
