Here's the deal: On cool, damp mornings, my 2001.5 Passat GLS V6 has a very loud whine when light to medium pressure is applied to the breaks, but only in reverse. I asked the dealer, and they told me that it was due to cold brake calipers and problems gripping the discs. Okay, small squeak I can handle, but this is so loud it's embarrasing. I find myself backing into my parking spot at night to avoid the whine. Got any ideas/suggestions?