STUTTGART, June 13 -- BYD has become the single largest plug-in hybrid vehicle brand in Germany, with the Chinese manufacturer's registrations across the country surging 232 percent year on year in May, its Atto 2 DM-i model alone outselling every other plug-in hybrid in the country and one in every seven plug-in hybrid vehicles sold in Germany now bearing a BYD badge. The data, released by the Kraftfahrt-Bundesamt and confirmed by the European Automobile Manufacturers' Association, has produced the most consequential single moment in the post-1945 history of the German automotive industry's competitive position, with Volkswagen Group, BMW and Mercedes-Benz all losing share in their own home market to a manufacturer that did not have a me...