3/15/2023 0 Comments Diesel engine shutdown timer![]() ![]() When you turn the key off on your Mercedes diesel, you may have noticed that the engine will not quit immediately. Since a diesel engine does not run on electric spark, the engine has to be shut off by some other means. When you turn your key off, electrical power is interrupted and the engine quits immediately. ![]() That type of engine runs on electrical spark of 12 volt power supplied from your car's battery. This problem almost never happens with a Mercedes gasoline engine. To be able to fix a diesel engine that will not shut off, you must first understand a little theory of how it works. On newer engines after 1985, look under the drivers side of the intake manifold just above the injection pump. On older 4 and 5 cylinder diesels look for this lever near the linkages on the top drivers side of the valve cover. On some engines the label may have been worn off. If the linkage is worn or maladjusted you may have to push really hard to get the engine to quit. Open your hood and look for a small lever with a red label marked " STOP." Put your thumb on this lever and push hard towards the engine until the engine stops. Stop Lever on 671 diesel engine: For those of you not familiar with the diesel engine, there is an emergency shutoff lever that will allow you to shut the engine off manually. How embarrassing in a busy parking lot! If you have just had an oil change done look for small vacuum hoses that came un-plugged around the area of your oil filter. QUICK FIX: In an emergency there is a lever on the left side of the valve cover that you can push to shut off the engine. SYMPTOMS: Your diesel engine will not turn off - even after removing the key from the ignition! In some cases it may take a long time and die very slowly. ![]()
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