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Mysterious coolant leak on drivers side control arms

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Old 05-21-2021, 02:06 PM
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15 S63, 18 Ram 2500 Cummins
Mysterious coolant leak on drivers side control arms

I literally looked everywhere and even thought for sure it’s the turbo coolant lines but from what I can see and even doing a pressure test, it’s completely dry by the turbos. Leak is coming from the drivers side motor mount area and leaking on the control arms and it’s a pretty steady drip. Any input? 2015 E63




Last edited by vikingdiesel; 05-21-2021 at 02:08 PM.
Old 05-22-2021, 02:13 PM
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993 cab, 2014 E63 AMG 4matic T
Do a pressure test on the engine coolant circuit and charge cooler.
With that much leakage, should be easy to find.
Old 05-10-2023, 07:14 PM
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CLS550
did you ever figure out where it was coming from?
Old 05-11-2023, 05:51 AM
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04 E55 AMG (totaled), 07 S550 4Matic, 14 E63S
Isn't there a hydraulic bushing?
Old 05-11-2023, 11:43 AM
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CLS550
the only thing close by is the motor mount

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