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Hello, I'm Brandon - VW tech.
The oil cooler is damaged you will need to replace it and also flush out the coolant system.
The oil cooler cause $122 and it is a 1.6 job including flushing the cooalant.
Make sure to use G 012 A8F A4 purple coolant.
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I assumed you have change the o-rings.
It is very possible the turbo is cracked. The Turbocharger does have both coolant and oil lines going in and out of it.
Here are the common areas where the 2 sections meet other then the oil cooler, turbocharger, and cylinder head.
The next common thing is the cylinder head has a link crack.
line crack. You have done an engine compression test?
By process of elimination the only thing is the turbo that have coolant and oil passage way. Check out the center shaft condition of the turbo. Please rate me positive for the prompt service thank you!
I will opt out and let other tech see this question. Do not rate me.
Different expert here.
So that I am not repeating what has been replaced and tested, please list absolutely everything you have done to this point to resolve this
Also, how much coolant is getting into the oil in about a week's time of driving?
Ok, outside reach, but have you pulled the thermostat and checked the inside of where it goes into the side of the block for cracks allowing the coolant and oil to mix
Ok, keep me posted
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OK- sorry to hear that, especially after you have put so much work into it already.