These are mostly models from 2009-2012 , and all of it is due to an attempt to cut costs by using interchangeable parts between models. This attempt at American style standardization has killed the ,now known myth, of German industrial quality invincibility.
Although time and time again, German cars have been the best, perhaps the entire world is going to s$%^ , using the concept of interchangeability and mass production. In our humble opinion, quality is always triumphant over quantity.