Help A4 cab wet back seat

[lewie226]

Noticed yesterday that the back seat (passenger side) was wet- I removed it an dried it thinking I'd left the rear window open slightly bug this morning again there is a small puddle where the seat would be.
as I sat there I noticed if seemed to drip from behind the side panel (where the speaker is).
the car is parked normally facing up hill
any ideas??
Done a bit of investigation and it seems it comes in when I squirt water direct on the back side window - could it be a seal??

[JLBmatic]

Noticed yesterday that the back seat (passenger side) was wet- I removed it an dried it thinking I'd left the rear window open slightly bug this morning again there is a small puddle where the seat would be.
as I sat there I noticed if seemed to drip from behind the side panel (where the speaker is).
the car is parked normally facing up hill
any ideas??
Done a bit of investigation and it seems it comes in when I squirt water direct on the back side window - could it be a seal??

Having scanned the forum briefly I understand there my be some drain tubes / holes which may be worth checking to see if they are clear; would be great if there was a list or thread showing where they all are on an A4 Cab if this is the case. I understand below the battery etc may be one location, but it does sound in your case as though there is a seal issue towards the rear...