Reuters BERLIN (Reuters) -Uncertainty over the future of European regulation on auto emissions gives Chinese competitors already ahead of the game an additional advantage, Stellantis chief executive Carlos Tavares said at a conference in Berlin on Tuesday. The chief executive said the so-called Euro 7 standards, which tighten car emission limits for pollutants including nitrogen oxides and carbon monoxide from 2025, are a "diversion from the major goal of electrification." "I don't think Europe needs Euro 7… it is going to divert part of our research and development power to something we don't need, while our Chinese competitors enter the…