this is my first post, and i might say this site is very useful and very proffesional. i like that ! i do have a question. i just bought a 2006 325i and did not get the owners manuel. i was wondering, is it normal for air to constantly be coming out of the center, top vent of the dash. i had a 1994 325 and i was able to turn that one off. what gives? any help would be appreciated!!