WOLFSBURG, Germany (Reuters) -- Volkswagen Group may have to set aside more than the 6.5 billion euros ($7.4 billion) it has so far allocated to cover the costs of an emissions scandal if car sales suffer, CEO Matthias Mueller said.
"The 6.5 billion (euros) apply to the recall," Mueller told reporters Wednesday after a tour of VW's headquarters here. "I can only speculate about any further provisions. Should there be a change in sales volumes, we would react rapidly," he said.
Asked whether a small group of employees could have alone been responsible for the deception, Mueller said: "We are still deep in the middle of the clarification, including the question of the possible culprits and causes."
Mueller, who replaced former CEO Martin Winterkorn a week after the scandal broke, said the investigations were "relatively extensive and complicated" and went back to 2005.
Lower Saxony Premier Stefan Weil, a VW supervisory board member, said VW sales had been stable in October so far.
VW confirmed it had stopped the sale within the European Union of new diesel cars containing the software that can cheat diesel emissions tests.
VW admitted on Sept. 18 it used illegal software to manipulate emissions tests on diesel vehicles in the United States, sparking the biggest business crisis in its history.
The admission has wiped about a quarter off its stock market value, forced out its long-time chief executive and sparked investigations and lawsuits across the world.