I would suggest to check again, a freind of mine has a ford fusion and that too fogs up the windshield like this and he also said no coolant loss.

I told him to measure the coolant loss after a month or two, he found the expansion about a cup low on coolant after 2 months of daily driving it.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)