I have a one year old A Class, the near side wiper had scored the windscreen in its arc as it moved over the windscreen, on inspection the metal fingers holding the wiper blade on the cheap wiper blades had jumped out of their holders and made a right mess. Why are manufacturers of very expensive vehicles sending them out with the cheapest possible accessories? I’ve replaced them with Bosch Aerotwins, with no chance of them causing any damage.