Need advice with Mercedes A180

[Thomas107]

Hi everybody. I found this evening after work that I had a lot of oil infiltrating my coolant reservoir. I drained it out but the more I cleaned the reservoir the oil keep coming out. My engine oil color and oil level are 100%. The car didn't get too hot either. Any suggestions?

[t walgamuth]

Sounds like an internal leak. I'd remove the cooler and its hoses and bench test them. Once the leak is isolated I'd repair it. A seldom used car you could loop the hoses to avoid the cooler and just use it without.