Many years ago I had a new Ford with a severe wind-noise problem at speeds over approx 50 MPH. After receiving no help from the dealer, I had no choice but to find the problem & fix it myself. I started by applying wide masking tape around all the windows & trim molding on the drivers side of the car. Then I got in thru the passenger door & drove to about 70 MPH. Big improvement. Then I would stop, get out & remove ONE piece of tape, get back in & do it again. After several tries, I discovered the noise was actually caused by a wide piece of stainless steel trim running up the A pillar. I glued a piece of black rubber weather-stripping in behind the trim, which seemed to solve the problem. Maybe a little masking tape will help you find the problem on your Volvo too.
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