I'm wondering if some drivers don't realize the vents on both sides of the dash have two adjustments. They adjust up and down to open and also open side to side. When I first got my 08 x5, the side to side adjustment was closed and only a small amount of air was coming out. Once opened, the air is more than enough for our warm summer climate in CA. I've also adjusted settings in idrive. I don't see a problem.