GL Class (X166) 2013-2015 after facelift became GLS (X166)

Intercooler Coolant Resevior

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Old 12-17-2020, 05:15 PM
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S 550, S65 Coupe
Intercooler Coolant Resevior

Does anyone know what the recommended fill level for the Intercooler Coolant reservoir is? The reservoir is located under the engine cover in the center of the engine. I can't see any markings on the reservoir. My reservoir only had a small bit of coolant in the bottom of tank. I search but can't find any info on it.
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E63SAMG2014 (11-12-2023)
Old 12-17-2020, 07:59 PM
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2017 GLE350 4MATIC
Please post your VIN and someone can look up the fill procedure.
Old 12-18-2020, 08:38 AM
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Old 12-19-2020, 09:17 PM
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Fill procedure attached. Nothing specific is given regarding the low temperature circuit.
Attached Files
File Type: pdf
X166 M278 replace coolant.pdf (407.1 KB, 616 views)
File Type: pdf
X166 M278 fill coolant.pdf (868.5 KB, 637 views)

Last edited by chassis; 12-19-2020 at 09:20 PM.
Old 03-26-2021, 01:23 AM
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2014 gl450
Originally Posted by Jim Ma
Does anyone know what the recommended fill level for the Intercooler Coolant reservoir is? The reservoir is located under the engine cover in the center of the engine. I can't see any markings on the reservoir. My reservoir only had a small bit of coolant in the bottom of tank. I search but can't find any info on it.
Sorry to revive this, but I spent last 2 hours searching on whats the correct level for intercooler fluid level. Were you able to get that info? Above attachments do not make sense. Thanks!
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Old 03-26-2021, 08:04 PM
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I never could get definitive info so I just filled it about half way. No issues after that
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