air con a6

I had a problem with my A6 a little like that - turned out to be a blocked drain hole under the battery. When you go around a corner the water sloshes to the passenger side where it finds the nice big hole that is covered with the pollen filter and pours into the cabin.

Quick test to see if it is this is to open the bonnet, pull the rubber seal off that holds the car-wide blanking plate at the base of the windscreen, take off the blanking plate and you will see an almost A4 (as in paper) sized pollen filter. See if it is wet. Then look at the battery and see if there is any water there (there was about 3inches of water in mine at the time. You then have to take the battery out (which is a real fiddle) and there is a drain hole under your battery. Stick you finger in and the crap that is there will move and so will the water (depositing under the car). When I phoned audi they were quick to point me in the direction of this drain hole - so I guess it is a common problem.

Ahh been getting that on the rear drivers side of our A4. I just assumed she'd left the window open. I wonder if its the same design????