Wondered why my car kept steaming up recently, even the aircon was struggling to keep the windows clear. On investigation I had about an inch of water underneath the carpets on the passenger side front & back. Spent all today bailing out the car and squeezing the foam out. Ended up with 3.5 litres of water removed from under the carpets and it was only damp in the rear passenger footwell. Couldn't believe how much water the foam absorbs before it starts to show through. Why don't Audi put a waterproof backing on the thick foam underneath the carpets? Squeezing it out is a real pain. Think I'm there now, had the carpets propped up with a heater blower on them all afternoon. Cleared out about a pint of gunk from underneath the battery and round behind the ECU. It was fairly dry but the drain holes were well blocked and with the really heavy rain we've had I guess they couldn't cope. Anyway I'm hoping that was the reason. What fun on a Sunday!