It looks like Hertz has updated their Italian fleet - I went it to check on adding an additional day to a reservation and the sample car had changed. What was previously a Ford C-MAX is now a Fiat 500X or similar. Likewise the mid-size wagon has changed to Jeep Renegade!
Sadly, the listed capacity for the 500X is smaller, with only 1 small suitcase instead of 2 for the C-MAX.
Does anyone have firsthand experience of these changes?