BERLIN (Reuters) -- Volkswagen works council chief Bernd Osterloh does not know whether diesel emission manipulations at the automaker involved 10, 50 or even 100 people, he told German news agency DPA in an interview.
"No one can tell that today," Osterloh said in a joint interview with VW brand chief executive Herbert Diess published on Friday.
Osterloh said there were structures within the company that are "problematic."
"But even if I take 100 out of [a global workforce of] 600,000, it remains a limited group," he said.
Diess said he saw no evidence of further misconduct at the carmaker beyond diesel-emission and carbon-dioxide manipulations. Compensation measures for VW owners will be tailored individually to market needs, he said.
He said the carmaker's orders were growing in Germany but falling in southern Europe, Britain and some overseas markets.
VW's sales in October showed an impact of the scandal with deliveries of the core namesake brand down 5.3 percent after a 4 percent drop in September. The decline reflected effects of temporary sales bans of diesel cars in western Europe, VW said.
Sources at VW have said that Diess is considering a reduction in temporary staff at the VW brand, the carmaker's biggest division. He said he saw no threat of job cuts for permanent staff as a result of the scandal. Diess this year joined VW from BMW where he was development chief.
German Economy Minister Sigmar Gabriel called for far-reaching cultural change at VW. The company must "leave no stone unturned and position itself anew," he said on Friday.
He also said the Porsche and Piech families, which own a majority of voting rights in the carmaker, had created structures at VW that were no longer right for a global company.
VW has been making slow progress in finding out who had knowledge of the rigging of diesel emissions tests two months after the manipulations became public in the United States. Earlier this month, it also admitted to cheating on carbon dioxide emissions certifications.
U.S. law firm Jones Day has been running an independent inquiry at VW into the emissions test cheating since September, and VW on Thursday pledged to speed up a program to encourage staff to cooperate in the investigations.
