Diesel crisis deepens as German brands recall 630,000 cars

Porsche, Volkswagen, Audi, Opel and Mercedes diesel cars will be recalled as part of a clampdown on nitrogen oxide emissions

Germany's top carmakers will recall 630,000 vehicles to fix diesel engine software technology that has been blamed for causing high pollution, while the emissions scandal engulfing Japan's Mitsubishi Motors deepened.

Porsche, Volkswagen, Audi, Opel and Mercedes diesel cars will be recalled as part of a clampdown on nitrogen oxide emissions, according to a German government official. BMW, which invested in fuel-saving technologies earlier than most rivals, is not part of the recall, the official said.