Sorry dloveless, but mine doesn't even have a vacuum line in that area. when I got my car, part of the engine was under the hood, part in the trunk, and part missing. Now it is an American car with an 85 500 Euro engine and the fuel system is a combination of both with a few of my own changes so everything works together.
It runs great, gets 22 mpg on the highway at 80 to 90 mph.

These engines are acutally very simple and easy to tune once you figur out how they work.

Good Luck

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84 500 SEL (307,xxx miles)