Line from the vacuum pump to the output side of the air cleaner:



End at the air cleaner is sitting loose in a hole at the air cleaner end (no seal) - air cleaner end from EPC:



Guessing I need to buy item 59 (A 617 238 00 80 Gasket Vacuum Line to Muffler Filter). Can I get a confirmation or correction on this?

Also - what is the function of this vacuum line, and what difference should expect once there is an actual seal at the air cleaner end?

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1961 220b: first project car - sold.
2000 CLK 430: first modern Benz - sold.
2001 CLK 55: OMG the torque!!! - sold
1972 280SE 4.5: Baby Gustav
1991 300TE 4Matic: Gretel the Snow Bunny - sold
1978 300SD: Katz the Free Man - given away
1980 Redhead: Darling Wife

That line is a vent from the vacuum pump.

It is desirable to have it sealed but you won't notice any difference in how your vacuum system works.

__________________


Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22

You're sucking a small amount of unfiltered air into your turbo as it stands.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13