I have Fiat 124 abarth spider 2017, the car has broken down three times since I got it new. it would not start or if started ran very rough every time. it was towed to the dealer for fixing, I am told that the spark plugs are full of carbon and are either cleaned or replaced. It does not make sense that I am told to drive it harder for the plugs to cleaned. I am been told from other sources that it could be a propulsion system problem or it could be Multiair brick needs to be replaced. As it going out of warranty earlier in the new year, I would like to know if what the dealer tells me is correct or what I have others have told me. Ta Ralph