Was it parked on a camber ? It sounds like it could be the water entered between the front of the sidescreen and the windscreen. When you drive along the plastic edging on the side of the screen pushes the water away from the sidescreen but it's not a watertight seal and if the car is on a camber water will enter there.
Edited to correct predictive text doh.
Last edited by Burgundymog; 19/12/14 08:32 PM.
