R reg Sharan water leak to passenger side footwell?

I have changed the pollen filter and it is correctly installed. I have also checked the heaters and ensured it isn't coolant etc. The leak seems to be coming from the passenger side above the window, it drips from the clock (which is central and in the roof) and from this point above the passenger side window. This car does have a sun roof so maybe that? Any ideas on what to do?

Tom
September 2011