Fiat upholstery is B awful for water staining and dirt retention. Water stains can be removed by washing gently. I have used a wet and dry vucuum cleaner to great effect and the seats have come back like new. Due to the type of material you need to treat the fabric with Scotch Guard or similar once they are dry to help keep them looking OK. The older the car the easier it is to remove the covers as the glue used to fit them gets wealer over time. They can be peeled off but if any foam pulls out a new cover wouldnt go back so well. Seat covers and cushions may be listed on
ePER They are for some versions.. Even with a fairly new car the seats need constant cleaning to prevent them looking terrible.