Hi All, First off, I'm not a car guy, I don't drive so my apologies. Hopefully you can stop me tearing, what's left of my hair out. My wife has an Audi A1 TFSi Sportback 2016, over the last 4 months or so we've noticed the passenger rear footwell having water ingress, started off damp and now, a small puddle, see images, a friend works at a garage so had the car in, the rest of the floor/footwells are dry, boot is dry, drain holes been checked under the windscreen etc, he 1st thought the passenger door card was the issue as the plastic clips, some were broke, so we had them replaced, inside the door was bone dry, so again nothing was found. Now some say the doors should have a waterproof membrane in the door, whilst others say not, so if someone could say for sure. So, we've contacted garages and body shops all of which say it's not a job they undertake, we contacted Audi who have said £150 an hour and a couple of weeks having the car, but no guarantee of locating the problem. Car recently had its mot and the garage had a look but couldn't find anything, it seems to be getting worse, we are currently using cat litter in pillow cases to try and mop up the water. We are at a loss and with the weather clearing up in the next few months, there's only a short amount of time to locate the issue, otherwise is waiting for the weather to turn again. Thanks for reading and hopefully it makes sense.