A car windscreen is under constant strain and very few people pay much attention to it despite the fact it deserves more. It faces constant exposure to rain, dirt and the impact of tiny stones. Sooner or later that leaves traces.But what do you do if your windscreen is chipped? Do you repair it or replace it? What parameters have to be meant for a more economic repair option? And is it really necessary. TÜV Rhineland has carried out crash tests to see if a chipped windscreen is as resistant as an undamaged one.