New purchase! 2003 s55 amg!
If blue, then probably washer fluid. Cracked tank? There are hoses that go to the windshield as well as to the headlights. Can you get under the car to look? You could try just pumping out all the blue fluid and replacing with the orange or yellow color some companies make (fogx) and give it a blast and look for ur next favorite color.
Do you mind saying how much you paid for the car?
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