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1992 Mercedes-Benz 300E Question: why my mercedes will not start when it is cold.

 

Question

lejune, Raleigh, NC, November 13, 2009, 12:49
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My car will not start when it is cold in the morning. But once it gets started it is fine... What could be the problem??

4 Answers
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  • Answer #1

    lawrenceg November 13, 2009, 16:33
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     Master

    Is your 300E a diesel? Sorry, don't know MB too well, but if it is, it might be the glow plug system. If it's not a diesel, check for vacuum leaks, this will do exactly what you describe.

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  • Answer #2

    sinautoscan.com November 14, 2009, 05:06
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     Master

    it could be the coolant temp sensor or the air temp sensor this sensor gives the temp information to the ECU which enables the car to start without any problems

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  • Medium-star Best Answer
    Visitor, February 28, 2010, 20:25

    I have the same car, and had the same problem. It was the coil, problem was when
    the coil was checked, using the old "jump a spark to something metal test" it appeared
    to be, a strong spark. This is deceiving because, the appearance of a strong spark
    doesn't mean, that the spark is getting to the plug. Have the output of your coil tested.
    At the same time, you might want to have your crank reference sensor checked.

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  • Answer #4

    Visitor, February 28, 2010, 20:32

    ... same car, same problem, solved it with a new coil. Have the out-put of your coil, and
    crank reference sensor tested.

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