[TIGHTFIN]

The same software should be able to write service history.
You can create a new list with correct entries and write it.

the software does not record and even the line in the menu has disappeared, as I understand it, because everything has been deleted and there is not a single service date.

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First, you need to find who has access to the database to get the service history for the car.

there is a history, just how to write it into the head unit.