I haver had a water leak coming inside the car at the passenger side wing. There is a what looks like an air vent - that can be seen up behind the fuse box in the passenger foot-well left had side. I have taken the wing off and sealed up all of the welds. I'm running out of ideas. My car is 2000 x plate Mark 2 Ford Mondeo. I love the car and just want to get the leak fixed!.
I was thinking of filling the air vent with expanding foam as I can't see were the leak is coming from without possibly removing the full dashboard.
Any help please!