I agree, there will be common problems on any vehicle, and you can always pick up a bad un.
However in this case, one in every 3 vivaro's/traffic/primaster has this 'design' fault, it stems from the panel below the window screen being incorrectly fitted so water leaks all over the injectors.
And vauxhall - who admit the fault will do bugger all to put it right, other than break or cylinder head and then want to charge for that as well.
I rarely get on my soap box but i think a warning here is valid, I'd like better odd than 3to1 that when parting with 6k for s van you then need to spend another 2k to keep it on the road.
Darran