Hello Elchgemeinde, my little friend V50, 2.0D, Model 10, is now doing all the honor of his equipment line “Summum”… Say, he hums, or snorts easily. The whole thing is best reproducible in thrust operation around the 2000 tours. I would suspect the difficult to locate place in the area of the right dashboard – rather up towards the window window window. The SuFu was not target in this case or I used the wrong keywords 🙁 Would be nice if I got a tip here. Greeting bibodo