I have always had my vehicles serviced annually. Last year I bought a brand new motorhome, my first. I thought i'd put it in for its first service this march, 12 months after getting it. However the Fiat Professional garage have informed that the service interval on Fiat Ducato is 30,000 Miles or every 2 years, The vehicle has done 7000 miles. I assume that there advice is correct and that this is compliant with the warranty guidelines????