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

Smoking on one bank after idle. 420cdi

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Old 07-25-2022, 03:02 AM
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C220 AMG Sport+ W205, GL420cdi X164
Smoking on one bank after idle. 420cdi

Hi all,
Hoping for some advice. We have a GL420 cdi which is fantastic but when it's been idling for more than a few minutes it will produce white/grey smoke from the drivers side exhaust only (RH drive model). Would anyone have any ideas as to what this could be or any experience of such an issue?
the car has now done 120k miles and us in great shape other wise.
Any help would be really appreciated
Thank you
Old 07-25-2022, 07:01 PM
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E55, GLS450, GL63, GLE350
From the few posts on the 420, they seem to be at risk for blown head gaskets.

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