I have a 2005 TL. The front defrost yields very little air flow. When I turn the defrost on, there seems to be marginally more air flow- but nowhere close to what it should be. The mode control motor works as evidenced by changing the flow to the feet or face. Also I can see that the arms are moving when I turn the defrost on/off and look behind glove compartment. One of the arms was not assembled properly upon further inspection and I unscrewed it then put it back in. Now the left/right dual control works and I do not believe it did before. No such luck on the defroster though. Is there anyway to manually change air flow to the defrost permanently? I have a lot of trouble seeing out my windshield in the mornings.