Hang on, do you know for sure what the crack was caused by, seems weird that its kind of hidden behind the windshield wiper? could it be a stress fracture caused at time of fitting. I had one of these appear on my Range Rover that was also at the bottom of the windshield and there was no way that it was caused by a flying stone or something hitting the screen, Landrover re-placed the windshield as a warranty claim no questions asked.

Bozz