Dont think it is the linkage keeping it from turning off, it maybe need of some tweaking. After talking to a local Benz Doctor, sounds like most if not all are the vacuum lines not being connected. He told me there were two brown vac lines coming out of fire wall on the '80. One went straight to the injector and the other would connect to the black hose that went to the vac pump. There would also be two yellows that were for ac or locks (cant remember) but I should pluc them off, I did so with some bolts. I connected the brown tube to the hose that runs to the vac pump. I almost froze to death trying to get car started so I came back in the house. There are two other plastic hoses he did not ID one is green the other I think I iD'd as going to the cruise control.
1st pic is before my routing.
2nd pic is after
This is what I am trying to get on the road
Am I on the right track??????