i have noticed that big trucks often leave diesels running and don't turn them off. I have been leaving mine running a lot when I go shopping or stop at the bank. Since I have to turn off key, reach under dash, find brown vac lines pull chopstick out of one, then connect it to line that shuts off fuel. Then unconnect brown line and reinstall chopstick plug. It's even more fun in the dark! Anyone else do this? Am I harming my beloved 83 300d turbo? I'd feel better if it removed the key, but then wouldn't the glow plugs turn on again when I reinserted the key? Is that a bad thing? Mike