Fiat 500 aftermarket Radio

[abarthmultijet]

Hello,

A guy who lives in the same village came to me after he converted his old original radio to an aftermarket one in his 500 (2008, 1.2).

Obviously the milage started blinking, so i told him to disconnect / remove the blue and me module and I will try to do a proxy allignment. Tried to do an allignment but it gives an error once it reaches the radio. Can anybody tell me wich byte I have to change for the milage to stop blinking?

Thanks in advance