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Green and Yellow Coolant - Mixing?

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E-Class (W212) 2010 - 2016: E 350, E 550

Green and Yellow Coolant - Mixing?

 
Old 05-12-2019, 07:08 PM
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E-350 Sport Sedan
Green and Yellow Coolant - Mixing?

After replacing my thermostat in my 2011 E350, I needed to add back in some coolant. The original coolant is green, and I only had some yellow Zerex G-05, which is also for Mercedes.

Now, I just read that mixing green and orange coolant will cause it to gel and mess up your engine. I'm not sure if the yellow coolant will do the same.

Did I do a big goof?
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Old 05-12-2019, 07:16 PM
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Nope, live long and prosper!
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Old 05-13-2019, 10:40 PM
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2010 e550 p2
yellow is for models up to june or july of 2011 i believe , so its a NO
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Old 05-13-2019, 10:42 PM
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so before that they used a blue one , if yours is green i would assume it was manufactured after those dates
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Old 05-13-2019, 10:55 PM
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2016 E350 Sport... 2001 C320 Avant Garde...
Aside from the question whether or not to mix different coolants (no opinion here), once mixed, the result will be a different color, neither green or yellow. Not bad if you can remember which coolants they were... I assume quite bad if you can't.
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