the bottom line goes somewhere onto the EZL area, but where does the top line go? is it just a plug?

this is a 1993 190E 2.6 with EGR and no vacuum temp sensors on the head.

It goes to the thermo valve on the Head (on the coler fan side).

By the way, Is the throttle body stil accessible as on the picture?. If yes, Could you please measure the gap between the flap and the body when it is closed?

In advance many thanks

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Present cars:
My car: E-class 420CDI, 2008, W211, V8, 180 000km

Wife's one: C-class 220CDI Sport Coupé, Euro, 2002, W203. 345 000km

Son's one: GLK class 220CDI, 2009, W204

Sold E class 260E, W124, 1988 beloved car sold after 489 000 kilometres of reliable services (engine M103, clutch and 5 speed manual gear box all original).

E-class, W210 320CDI, 2000[/B], 225 000km, Sold

this is a 93, i dont have a thermo valve on my cylinder head

and yes, ill try to measure the gap between flap and body, intake is completely off car at this moment