C4 Spacetourer from 07.18 not E10-suitable??

Our car is currently for the second time within a week in the workshop because of engine damage. The workshop had no idea what the car had. Grade at the small talk I mentioned that I was refueling E10 (PureTech 130, petroler). Then the ladder said that this will be the problem. On the side of the fuel is that all cars from Citroen are suitable after 1.1.2000 E10, exception is the C5. That would not take the guarantee and we would have to pay the repair ourselves. W are your experiences?