Happened to me as well. The problem started last year ('11 Ltd, AWD, 42k miles), disappeared in the spring, summer, and fall, but then got progressively worse once the temp's went below freezing. No amount of hard/soft closing, wd-40, electronic cleaner spray, and other fixes would work. I bit the bullet and went to my dealership. While the service mgr mentioned that there was a TSB, I forgot to ask him for the reference #. I am far from handy, so long story short I paid about $340 for the repair.