I just changed both the fuel filters in my 81 240D, (and replaced my air filter if that means anything) and when I started my car up, it was fine...until i tried to shut if off. car kept running and i had to use the kill switch marked STOP on the engine under the hood. I thought that would reset my system, but NO. Still wont stop when i turn off the key. When I turn off the key the battery light comes on too. WTF?? If you can help, please. Semper Fi, Boston