Ducato Motorhome 2008-2015 used buy – What do I pay attention to?

Hello together. I would like to buy a used RV in the 5T+ class and not infrequently these are based on a Fiat Ducato chassis. Therefore I would like to deal a little closer with the Italian. I am not from the subject, but from the sort “What I can do myself I like to do”. So brakes, oil changes I basically do myself and timing belts have changed already. So I have fundamentally something technically savvy. mobile is basically not cheap and costs a lot of money, so I would like to know what I should pay attention to with the Ducato campers in the category. What are frequent problems that one should face, or topics that one should know? Probably I will end up somewhere in the year of construction between 2008 and 2015. What I have already researched I would like to have the 3.0L engine with 158 or 177 hp. Ideal would be control chain. I have read s Is this just a switch-gear unit or an automatic machine? And can you limit that to certain years of construction? Somewhere, too, there was a problem with the electrical system. Does someone know more about it and what kind of electrical system is meant? The motor electrics? What are your experiences or what do you know about this model? I would be very pleased about information about the Ducato substructure. With such a purchase price sum I would also be in Kau f take the vehicle to a workshop or test bench to have the worst thing checked. I have never done that before, how are your experiences there? Where do you go there what can they check and what is reasonable for the seller in the context of a pre-purchase? I thank you in advance, many greetings, Oliver