'84 117 engine (Euro 500)...

I have a hard plastic (opaque white & red stripe) line sticking up in the air immediately behind the distrributor and in front of what I think is the warm up regulator that goes down into the valley underneath the air cleaner. I can't see where this is supposed to be connected (if it is) or if its function is "vent" line...

Anyone have any idea?

__________________
"Dangerous with a wrench...and not smart enough to know it"

Stable (in order of acqusition):
'84 500SL, 280SEL (Euros)
'77 280SE. '90 560SEL
'79 450SEL 6.9,
'95 C280 (totalled by daughter 8/07)
'81 280SL (rescued) '88 300CE
'86 560SEC '95 C36
'01 CL55

DD's: '04 S500 4Matic (SWMBO)
'04 F150 Crew