BMW denies manipulating or rigging diesel emission tests

German top-of-the-range carmaker BMW on Thursday denied suggestions in a newspaper report that it might have cheated in pollution tests on its diesel cars, as rival group VW has admitted to doing. "The BMW group does not manipulate or rig any emissions tests. The report had sent BMW's shares into a tailspin on the Frankfurt stock exchange, as investors feared that other manufacturers were also involved in the massive pollution scam at Volkswagen.