The last two times I have driven at Interstate speeds into a strong, cold wind I have experienced a loss of cabin heat.
Once I get off the highway and slow down the heat starts pouring out. This is in temps below freezing.

What could be happening to me and my cold feet?

Thanks

__________________
John

1995 E320 - 115kmi+ Smoke Silver/Cream (Wife's Wagon)
1989 260E - 195kmi+ Black/Grey (My Panther)
1984 300D - 242kmi+ Black/Palomino (Retired)