Quote:
Originally Posted by adamkat22
Then the very bottom has a drain plug, and then something that looks like a plug but doesn't open and I'm unclear of its function.
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The drain plug is the one you see at the right, facing the front of the car.
The second one is a top-secret drain plug to be used only when the radiator is installed on North Korean market police w123s.
Sorry, very inside joke
Put it this way: if you twist it and it doesn't open, try the other one.