I ordered a Diesel shut off valve for my 1983 300SD and the parts came in, a shut of valve, 2 gaskets and another valve that has 3 vacuum ports and a click switch at one end.

I installed the shut off valve and gaskets (it was a pain). The engine shut down perfect now. Where I am confused is the other valve, I don't have a clue where it goes or even where it is located.

The part number on the bag is 11611844 (22) and 002-997-53-36 also GD40M

Anybody know what this does and where it goes?

The second part number is the vacuum control valve. On my '79, it is right on top of the injection pump. You can't miss it, especially if you just replaced the shut off and it was in the rear of the pump. Maybe your '83 is different.

That is for EGR/ TRANS vacuum control on top of the valve cover, under the black cover. Have no idea why you would need that for engine shut-off!

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