Hello. I have just come across this forum this morning as I have been trying to research for weeks of how to fix this same issue. I have heard it a few times on the passenger side near the B-pillar, but most times in the A-pillar on the driver side. As someone else had mentioned when i test drove this car from a private sale last year, i did not go beyond 50km/h to hear this. I notice it starts up around 80km/h and much louder when 100 or 110 km/h especially more so on windy days. Couple other things noticed is when driving over the highway and going over the slight bumps, the window seems to slip (maybe less than 1mm) down and causes the noise to get louder, then I have to push the window back up again with door handle (that has worn threads and is loose) to reseal it and lessen the noise. Also depending on how windy it is, you can either see the window flexing in and out when the wind catches it at the A-pillar or you can feel it with your finger. Now that its getting colder, it is also the first area that fogs up when the heater is turned on - which once that driver side window begins fogging eventually the rest of the windows in the car fog up.
This issue has been going on for a year now, but it was not until this past month or so it is driving me nuts to figure out how to fix it. I had read that cars my age, the window seal and window track seals could be brittle and worn out. I am thinking of getting this looked into and requesting new seals as a precaution, as practically everything that is still original in the car has been getting replaced sooner or later within the past year under my ownership.
