Also me. Part after the mass and also the part that come into the butterfly valve is quite different (mine is a W202 C200Kompressor Italian engine model of C230, with same power).

As far as that plastic box is the oil vapour recirculation, there should be already here my request in an old post with relevant explenation by other member.

One tube came from the air filter box, another from the oil dipstick, one from the supercharger (why?) and one from the top of engine.

That area in my engine is a little dirt due to oil vapour, so I was asking if some kind of maintenance is necessary. It seems no.