What was the last MB model that had flow thru ventilation where with the right setting just the speed of the car allowed outside air to enter the cabin?
I always enjoyed that sensation. No motor or fan noise, just flowing air.
My 107 and 113 has it. I don't recall if the 123's had that feature.
I had a 1949 Plymouth Flathead Coupe that had a "flap" that you could open at the base of the windshield to allow air inside. I always used in the summer.
I guess it was the same principle with fold down windshields back in the day.
Forgive my daydreaming....
jz