He stepped in after his predecessor went to jail over Dieselgate.
VW Diesel Scandal
Plan would boost profit at VW brand sooner, to cushion big EV push.
Diesel scandal has so far cost more than $25b in the U.S. alone.
Audi's former CEO, meanwhile, remains in jail.
Buybacks of 500,000 cars will continue through 2019.
Scandal pits Porsche-Piech families against labor, regional interests
This on top of the $4.3 billion fine in the U.S.
Fiat Chrysler Chief Executive Officer Sergio Marchionne reprimanded the company's top U.S. spokesman for issuing press releases about Fiat's vehicle emissions practices days after Volkswagen's disclosure in September 2015 that the German automaker had used illegal software to evade emissions tests, documents released Monday show.
Audi has discovered emissions-related problems with a further 60,000 cars, it said on Tuesday, dealing a fresh setback to parent Volkswagen more than 2½ years after it first admitted to cheating U.S. diesel exhaust tests.
Volkswagen Chief Executive Herbert Diess traveled to the United States this month to testify to authorities about the carmaker's emissions scandal, German newspaper Bild reported on Tuesday.
Federal prosecutors in Detroit on Thursday unsealed charges against former Volkswagen Chief Executive Martin Winterkorn, accusing him of conspiring to mislead regulators about the German automaker's diesel emissions cheating.
Volkswagen's first-quarter operating profit fell on Thursday, but optimism over its new chief executive, the carmaker's financial health and lower provisions for the diesel emissions scandal lifted its shares.
Porsche has appealed against the seizure of files by prosecutors during a raid last week on the sports car brand's premises related to inquiries into diesel emissions test manipulations, prosecutors said.
Porsche's head of powertrain development has been arrested by German police in the sweeping investigation of diesel emissions violations by parent company Volkswagen Group, sources told German media outlets.
Volkswagen has taken parking lots to a whole new level in the United States and will not be emptying them soon. Volkswagen AG has paid more than $7.4 billion to buy back about 350,000 U.S. diesel vehicles through mid-February, a recent court filing shows. The German automaker has been storing hundreds of thousands of vehicles around the United States for months.
Volkswagen will buy back new diesel cars if German cities ban them, it said on Thursday, seeking to reassure potential buyers and stem a plunge in sales of diesel vehicles.
Lawyers for more than 50,000 British car owners kicked off a lawsuit against Volkswagen in London's High Court on Tuesday in a battle for compensation over a diesel emissions scandal that has engulfed Europe's largest carmaker since 2015.