I was in a Mercedes dealership yesterday and asked about Motorhome base vehicle warranty. The base vehicle warranty starts when it leaves Mercedes therefore the warranty is running while it is waiting to have the Motorhome body fitted and also whilst it is sat on a dealership forcourt waiting to be sold. It is not uncommon to find the warranty has run out before you drive it off the forecourt.You can check the age of base vehicle by going to a Mercedes dealership with the chassis number or a quick look at the date of the tyres will give you a rough idea but this is not as good as getting the chassis number.I do not know if Fiat is the same but might be a good idea to check.