My 190D 2.2 started leaking diesel. I found the drip, but I need help identifying the part it's coming from. It's bolted to the side of the engine, underneath the air filter housing, and comes right after the prefilter. It has 3 other hoses coming out of it.

What is it? I tried looking through some of the online parts catalogs to jog my brain, but I can't locate anything that matches what I see. It would be very helpful if you could also point me to where to buy a new one.

Thanks a bunch.

Jason

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1984 190D 2.2