Greetings,

The other day I replaced the #4 line from the injector pump to the cylinder on my 1984 190d, 2.2. While I had the parts removed to get at it, I noticed a round something on top of the pump that has a vaccum line running to (or from) it. But, there was no line attached to it. I looked and looked for a vaccum line that might have come off. Well, I never did find it. I was just wondering: does this part have a line running to it, or is that just the way it should be? O yes, should that metal line have any contact to anything between the pump and engine? Right now the line (its the longest line) is pushed up against an bracket. O yes again, the line costs $58 at the Mercedes dealer in Nashville, and $38 in Bowling Green. I had to get it from Nashville because I needed it that day. Take it easy.

Hugh Sr.

Perhaps, if your engine is governed via vacuum, it is that line. I'm sure another forum member will be able to give you a certain answer.