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Oil mixing with water

Why is oil mixing with water in the radiator water reservoir tank?

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1 Answer

@augustineaduge the most common issues for that are:

  • blown head gasket
  • cracked engine block
  • intake manifold gasket leak
  • cracked engine oil cooler

you did not tell us what you have already checked or if anything happened to your MB just prior to this. At minimum I would suggest a compression test as well as a Cylinder Leak-Down Test which will be the most diagnostic test.

For any further help, we will need to know the exact engine size/model of your Mercedes Benz

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