I have a month old A6 2.7tdi Avant S Line Le Mans, and lifting the tailgate this evening, I can hear water sloshing around. It rained somewhat last night. So, unless I can take time out to visit the local dealer, any ideas how this is occurring and how can I relieve the water, which seems to be trapped in the outer area of the tailgate and seems to run from the bottom to the top when lifting it, presumably through some internal side channels. I am rather concerned that premature internal corrosion will occur if not checked swiftly.
Thanks.