I'm having trouble changing the climate control vent settings on my 2004 545i. All the air is directed at the windshield in the auto mode. I use idrive to make the necessary adjustments, but the vent settings continually revert to inappropriate setting when "auto" is selected. In other words, the changes aren't being saved. The owner's manual references the ability to select the auto mode when changing vent settings, but I'm unable to do that. Thanks very much to anyone who can help me out.