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. 2005 Fiat Ducato Service and Repair Manual 2005 Fiat Ducato Service and Repair Manual. Fixing problems in your vehicle is a do-it-approach with the Auto Repair Manuals as they contain comprehensive instructions and procedures on how to fix the problems in your ride.