my diesel escape?

Good day these days I saw that the part in my car is wet, it looks like fuel, does anyone know what this part is? sonerkyl 2017-02-15 17:33:19

It may be a bit difficult to get diesel there, possibly a sweat or oil sweat. If my skin continues to clean and observe, there may be a permanent oil leak.

There is always all black oil in there, I wipe it back 1 month later .. I would never mind because there was no decrease in 10000 km ..

I cleaned it today, it says BOSCH on the cylindrical metal piece, What this piece does, the master said it is sweating but it looks like a leak because it is very wet

There is a diesel filter under the black pipes to the right of that piece. Absolutely missed fuel. Look, there is benefit from the nail. Look at the pipes coming from the filter

Pipes right into that piece

about 2000 km ago I changed the diesel filter, the mechanic's apprentices changed the filter, they did something missing, let me look at it as soon as possible