Recently purchased a 2015 a6 avant, came with the panoramic sunroof (wasn't a necessity to me). And after a few days of heavy rain noticed the passenger side carpet was quite a bit wet. The driver to but not as bad. I have see the water trickle down the bottom of the pillar when raining heavy. But I'm not sure whether it's the sunroof now. I've tried everything out, opened the sunroof and I have poured water into the 2 front drain holes and both have drained outside the car with nothing coming in? Is this because of the amount of water I've used compared to heavy rain ? Or is the issue else where. Around the sunroof is a lot of dirt and grime. Could this be clogging the drain pipes and flooding them as from my test they seem to drain well..
Also the headliner feels dry?
Confused here. Thanks

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