Just learned about possible injector failures on Ducato based MH’s (I’ll try linking the video on you tube). Apparently water can get under the plastic engine cover and cause the injector seats to rust leading to large repair bills. The video tells the tale. I just stumbled on in then checked mine. My MH is 3 years old this July and even at that age had a spot of light rust on the injectors. WD40 then CopaSlip spray hopefully sorted it but thought it’s worth checking your Ducati’s. Pics of mine attached.