thank you kerry and fattyman!! I will block off the green and yellow lines tomorrow and cruise it for a while and see what happens. Also, do any of you
know where the two black lines that go into the firewall are connected to? They are disconnected and don't know where they go? I understand one is a air vent, but the other? my cruise control is not vacuum as I see its electric as I checked the steering column and didnt see a vacuum line for it. It's a 1984 300d W123 chasis turbo diesel.