Berlin: Volkswagen must act now to secure competitiveness, the German auto group's controlling families said on Thursday, in their clearest message yet to management amid ‌a push ⁠to ⁠ramp up cost cuts and fend off Chinese rivals."The Volkswagen Group is at a historic crossroads. For the sake of the company and its sustainable competitiveness, everyone must now step up ⁠and take ‌responsibility," said Hans Dieter Poetsch, board chairman of Porsche SE, ⁠the investment vehicle of the Porsche/Piech auto dynasty and Volkswagen's top shareholder."The longer ​decisions are delayed, the bigger the problems will become," Poetsch added.Porsche SE finance chief Johannes Lattwein called on the group to reduce ‌excess capacity, significantly lower costs and strengthen decision-making.Porsche SE reported a ​14.5% ​drop in ⁠its adjusted half-year earnings after tax to €949 million ($1.1 billion) on Friday.It owns 31.9% in ​Volkswagen and 12.5% in its sports car subsidiary Porsche.