It's the weather. Are you in a cold climate? I've seen several coolant reservoir leaks in the past few weeks including myself.

It's a good sign you can smell: it means not likely internal leak into engine/oil.

Take a dry paper towel and run around all sides of the reservoir and hoses (wear gloves you want to do when hot and pressurized)


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2011 E70 • N55 (me)
2012 E70 • N63 (wife)