Fiat Ducato Workshop & Owners Manual | Free Download Fiat Ducato. The Fiat Ducato is a light commercial vehicle developed by the Sevel joint venture between Fiat and PSA Peugeot Citroen, produces since 1981. Since 1981, more than 2.6 million Fiat Ducatos have been produced. The Ducato is the most common motorhome base used in Europe; with around two thirds of motorhomes using the Ducato base. FIAT DUCATO OWNER'S HANDBOOK MANUAL Pdf Download. Page 2 Thank you for selecting Fiat and congratulations on your choice of a Fiat Ducato. We have written this handbook to help you get to know all your new Fiat Ducato features and use it in the best possible way. You should read it right through before taking the road for the first time.