GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

Check Engine P0670 and P0675

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Old 11-29-2013, 08:04 PM
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GL320 CDI
Check Engine P0670 and P0675

2008 GL320 CDI.
Check engine came on with P0670 and P0675 codes. It says Glow Plug on cylinder 5.

This is our first diesel, can you guys help out? Some pics would help.

Thanks.
Old 11-30-2013, 11:31 AM
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99 E 300TD, 02 E320, 2013 ML350
Check internal resistance of the plugs. These also had a problem with glow plug modules. If the wiring and plugs check out, then a new module will be needed.
Sorry Im not sure how to add any pics
Old 11-30-2013, 12:25 PM
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GL320 CDI
Mstrbenztech,

Thanks for your response. Please excuse my ignorance, I will check and verify the wiring but how do I check the internal resistance of the plugs? That's something I have never done before.
Also, is the module same as controller?

Thanks.

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