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Discussion Starter · #1 ·
Hey guys

Love to know if anyone else has experienced this. I have just picked up a 2003 a4 Convertible 1.8t and I absolutely love driving it this summer.

I have just recently discovered that there is a thick brown milkshake looking substance in the coolant overflow tank. There is no milky residue under the oil cap, no milky residue on the dipstick, it is not overheating, and is driving perfectly!

The brown milkshake doesn't smell oily but rather has a peculiar fruity smell????

Does ra anyone have a clue at what could be causing this?
I should add it has only done 117km, has been serviced religiously, and we'll taken care of!
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