He and four others could face prison, forfeit millions of dollars.
VW Diesel Scandal
VW, which settled with the feds and paid fines, says 'the SEC is now piling on.'
VW admitted illegal activity to regulators but didn't inform investors.
About 61 vehicles disappeared from the lot in 2017.
There are 370,000 of the models under investigation in Europe.
Since 2015, VW has paid out more than $30 billion over the 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.