M-Class (W164) Produced 2006-2011: ML280CDI, ML320CDI, ML420CDI, ML350, ML500, ML550

2009 ML320 W164 Glow plug

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Old 02-23-2021, 08:40 PM
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2009 ML320 W164 Glow plug

Hello, my vehicle is currently at 99k miles and around a week ago I had got the glow light that would come on during starts for about 10 seconds. Currently, when starting the vehicle the glow light remains on for a minute and disappears, however the CEL remains on. I have no issues starting the vehicle. I was able to scan the vehicle and got code P0672 for the 2nd cylinder glow plug. Should I go ahead and replace all? Also could it be an issue with the control module?
Old 02-24-2021, 12:48 AM
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There are no "P" codes in any CDI or Blue module.
Old 02-24-2021, 12:52 AM
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Oh wow, not sure. This is what I see on my Scan tool.
Old 02-24-2021, 02:06 AM
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W164 320 cdi MY 08
Originally Posted by MLatic
Hello, my vehicle is currently at 99k miles and around a week ago I had got the glow light that would come on during starts for about 10 seconds. Currently, when starting the vehicle the glow light remains on for a minute and disappears, however the CEL remains on. I have no issues starting the vehicle. I was able to scan the vehicle and got code P0672 for the 2nd cylinder glow plug. Should I go ahead and replace all? Also could it be an issue with the control module?
Had the same issue more than one year ago with one glow plug failing and the light staying on about 10 seconds after cold start. Replaced the only glow plug that was broken and 20'000 km later no issue at all and no other glow plug has failed.
Old 02-24-2021, 05:09 AM
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Originally Posted by MLatic
Oh wow, not sure. This is what I see on my Scan tool.
Here are the codes for CDI. You need a scanner instead of a cheap code reader.
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DTC ECM 164.122.pdf (312.6 KB, 50 views)
Old 02-24-2021, 09:07 AM
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Did you DIY for the single glow plug, If so where did you buy it from?
Old 02-24-2021, 09:08 AM
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Oh okay, I will try scanning it with a better tool, and let you know
Old 02-25-2021, 03:42 AM
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Originally Posted by MLatic
Oh okay, I will try scanning it with a better tool, and let you know

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