My windscreen on my Mercedes had a small chip about 2cm from the edge at the top, it must have been from a stone I presume. When I called to get it repaired I was told it was too close to the edge and could not be repaired, I was then told of the need to have the camera realigned after so I simply left it alone. Fast forward a year and when washing the car on what was a hot day the cold water on a hot screen was enough to crack the screen. The crack originated from the chip all the way to the bottom of the windscreen.