Take roof rails and trim off sealer splits under black trims and tailgate hinges they are prone to leak and under dash .

Well, you're still managing to stay busy. Hopefully, Kuga will be all finished doing very well, Mark 😊

Excellent job as always Mark and keep warm get well soon 👍👍

The bolt holes do not leak. The riv-nuts are blind, not open. Also the rear ones would drip the water onto the headlining, resulting in visible stains on the healings under the rail mounting points. the seam sealant under the roof rails cracks front and rear, allowing water in. The leak is on the seam between the panel that is the roof and the panel that is the rear quarter. This video shows where the leak is, but incorrectly identifies the actual cause. Take the rails off, and you will see the cracks front and rear. Scrape the sealant off, and it will have water under it. So, he right about where the leak is, but wrong about how.

Very well done Sherlock, this should fix the water ingression,👍

Get well soon mark

Could be a leak round the rear light unit.

For ‘Humidifier’ read ‘De-Humidifier’ it’s reducing the moisture content Not Increasing it🙄

Mine doing exact the same carpets are soaked only had it a week

I had a mk2, it came in on the roof rails & the tailgate rubber !

Dont have a kuga but your fault finding methodology should work on any car Thanks for uploading

Water running down rail bolt threads

I think it’s caused by heavy weight on roof rack

I have a 2015 kuga and floor absolutely soaked. Think its the rear lamps or boot seal as dont the roof rails butnits still leaking somewhere

My guess would be the rear quarter glass?

Did you have to remove the centre console to get the caperts out ?