I have a 1982 300D turbo and the car will not shut off. I have to open the hood and manually shut it off with the kill lever. I know its a vacuum leak coming from a now defective door actuator, but is there a single point in the engine compartment that I can plug? If so, can you describe where I might find it?

 

The engine is shut off via a vacuum diaphram on the injector pump thru the ignition switch. I would plug the leaking door lock diaphram