I have a serious leak inside my A3 on the passenger side - front and rear wells. After I washed the car today and removed the rubber mats I could see that the carpet in the passenger well was wringing wet - not just damp but water was covering the rear carpet. And when I checked the front passenger side mat that was not as bad but still very wet. Drivers side front and rear are dry. I have checked the door seals and they seem fine and the drain hole under the bonnet is not blocked; at least when I pour water into the hole, water comes out underneath. Are there any other seals/drainage channels which I should check or does anyone have any ideas? Removing the carpet looks to be a major job and will that help anyway? I appreciate any advice or suggestions which anyone may have. Thanks.