How to change W222 speed meter and temperature from F to C

I have a Mercedes-Benz w222 manufactured in the USA. I want to convert the radio and speed meter and temperature from F to C.
It means change speed meter from mph to Km/h , and command (Head Unit) from US to ECE , it will via xentry?

I am new at this field. Any one know how to change it be xentry or vediamo ?
I have MB SD Connect C5 and  Dell D630 Star Diagnostic Tool With Vediamo V5.00.05.

Ps. here is the ECU chassis number :WDDUG8CB9EA009893

 

 

Solution by experienced MB technician: 

ECU version is required so can get the steps. They vary from car to another.

According to your chassis Number, this is the ECU details:

 

Diagversion: IC222_E007_2_Muster

Steps Via Vediamo
1- go to CBF FILE (IC222)
2- Select ECU Variant (IC222_E007_2_Muster)
3- Tab Coding then Variant Coding
4 Coding window will open up

For the temperature C Scroll down o Anzeigeeinheit Temperatur (Unit_Temp) and Choose C.

All other Functions are in the same window

 

Steps Via Xentry
After reading the car go to the ECU Called IC- Instrument Cluster (A1)
Then choose Author data then click on alle_Codierungen. on the right side choose whatever coding you want to change. It should do if the function is available.