I knew someone of questionable mechanical ability owned my 1987 300D previously when I saw a manual choke cable wired up to the stop lever under the hood.
I'd rather solve the vacuum leak with the proper diagnostic tool (Mity Vac) than route a choke cable under the car.........
My 1982 300D had a vacuum hose of the wrong size going to the transmission modulator. It fell off. Previous owner thought it was natural for Mercedes diesels to shift hard as a rock.
300D