LAST NIGHT MY SON AND I WERE DOING OIL CHANGE ETC. (WE JUST BOUGHTTHIS 83 240d) we started it up then when went to shut it off. it just kept running i did find a lever that had stop on it must be a manual fuel shut off. i did find out it might be a vacum problem broken line etc. it was getting dark but i did see a small 1/8 line that was going up to the dash so im thinking we broke this when we changed the oil filter does any body know where that small line would go thanks for your help