Sorry if this is in the wrong place. I searched to no avail. The leak comes in just behind and above the windshield directly above the curve of the driver side window. The headboard and pillar are wet and the seat and floor are wet. Maybe the roof pan rails? Thanks for any advice

 

You would have more luck getting an answer first with more details, like year and such of your Mustang.

THEN post in the section for that model.

 

Sorry. It's a 2006 coupe