Mercedes-Benz Forum - View Single Post - (x-post) Glow plug light intermittently coming on while driving?
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post #2 of Old 01-24-2016, 08:09 PM
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It would not make sense to spend money on that unless it could be verified.It is one of those I can't fix it if it is not broken.To look into it, the possibilities are not that great, the glow control itself,the ignition switch would be suspect, watching it until it happens is the only way.If the ign. switch 15 circuit was to break then make the circuit Could cause that, otherwise the glow control under the dash may be most likely.If it came to my shop I would not go beyond this story, taking money under this circumstance would be theft, it is Very unlikely to find the cause.I have seen this a long time ago, it was the control falsely turning itself on. I would check to see if that part is still available.
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