cdti

I have a wet (UK) passenger side carpet on a non-sunroof W207. Having lifted up both front and rear carpet sections briefly, there is definitely a water leak coming from somewhere. I have cleaned the windscreen drains by the battery cover, they did have some debris in them. I have also removed the front and rear drain plugs of the left sill jacking points, there was no satisfying gush of water out of them unfortunately!

Are there any other common areas of water ingress?