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Discussion Starter #1
Ok. Finally tracked down the culprit for this mystery fluid that seemed to show up the first time I used the heat on my 93 m104 300e. Can you guess the fluid??!
It’s from under the engine bay.
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Nasty coolant.
 

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Contaminated engine oil . Or contaminated coolant its not sitting on the floor flat enough for coolant alone . Check the coolant in the overflow tank . And also check fluid in both engine and auto gear box for same colour as that on your floor .
 

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Discussion Starter #5
Ok. Not such a big reveal but it was my engine mount. Don’t think it had anything to do with running heater...had me very concerned though!! Thought I had chocolate milkshake coming my way but the expansion tank is on point. No other signs of leaks above mount either...see pic of mount.
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