Rear footwell fills up with water. When about 3 inches of water in well it transfers to front well. I ran hosepipe on front windscreen and water leaks in and I think runs down a channel in the floor plan to the rear. Cleared what debris i could but have not yet removed pollen filter as its awkward to get at. Earlier A6's had problems with water under blocked drain plugs that were under the battery but that is not so with my audi as the battery is in the boot. I do not have a sun roof.

Any suggestions where the water could be getting in would be much appreciated