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Old 07-29-2013, 02:57 PM
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Zacharias Zacharias is offline
Not so amused
Join Date: Apr 2010
Location: West Quebec
Posts: 4,025

It's the EGR valve and yes in theory it is supposed to have a vacuum connection. However, people sometimes *modify* the EGR to gain a bit of performance, so it may not be an issue.

Please take a photo or two of how the vacuum lines are hooked up on the driver's side of the engine compartment (to show how the various vacuum lines and connectors are set up). There should be one open vacuum bleed line, running from the side of the yellow plastic valve assembly on top of the injection pump. Other than that, there should be no open vacuum lines or connectors.

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

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