Leaky Roof

Before you all shout I've done a search and the main problem seams to be the sunroof well mine doesn't have one.

The other half was driving to work in our 04 TD5 a few days ago and noticed water dipping on to the centre of the dash from between the head cloth and the window screen.

Can't understand where it's coming from like I said don't have a sunroof and would have though if it was the roof rails it would drip on to the drivers head or passanger seat.

Any help would be great don't want to rip the head cloth out for nothing when there's a 300tdi needing a 2" lift.

I've seen posts on leaks coming from the mounting points of the roof rails and also from the windscreen joint to the body although it's bonded.

Leaks at the roof rails like the sunroof will have water running over the top of the headling so drips could appear anywhere.