Schmidt agreed to be deported to Germany after serving his sentence.
A Volkswagen senior manager has been sentenced to seven years in a USA prison for concealing software that was used to evade pollution limits on almost 600,000 diesel vehicles.
VW auto engineer James Liang was sentenced in August to 40 months in prison and fined $200,000 for his role in the scandal - four months more than prosecutors recommended. They include executives who led engine development as well as the failed efforts to design a diesel engine that would meet the tougher emissions standards the United States adopted for 2007, as well as another liaison to U.S. regulators. The government says he later misled USA investigators and destroyed documents. He argued that he was following a script written by the company's management and one of its lawyers when he lied to the California Air Resources Board about the compliance of VW's cars with U.S. regulations, and that he had come on board after the scheme was devised. Schmidt said he first learned about the company's scheme in the summer of 2015, at the tail-end of the conspiracy.
Mr Schmidt, a German national, is one of eight current and former VW officials charged in the U.S. in the diesel emissions scandal.