The head of VW cars in the UK has apologised "unreservedly" for "significantly" letting down its customers in the diesel emissions scandal.
It comes days after the American boss of VW made a 'sincere apology' over the scandal which has affected more than 11 million cars worldwide.
The research and development chiefs of Audi and Porche will be dismissed, along with Volkswagen's top manager in the United States as the car-maker struggles in the wake of an emissions-fixing scam.
The manufacturer was found to have been manipulating emissions data in the US to make it appear as though some models were more environmentally friendly - with the German Transport Minister today revealing cars in Europe had been affected too.
A senior source at the firm said Audi research chief Ulrich Hackenberg, his counterpart at Porsche Wolfgang Hatz, and VW US chief executive Michael Horn would be dismissed at a meeting of the supervisory board tomorrow.
Volkswagen, Audi and Porsche have all declined to comment.
Volvo withdrew an app comparing cars' emissions in 2011, after being told by that the data "could not be taken seriously".
Volkswagen's US boss has admitted he was told in spring last year of the emissions cheating affecting millions of the company's vehicles.
Volkswagen could start recalling cars containing emissions cheating software in January, according to the firm's new chief executive.