VW scandal: chief executive Martin Winterkorn refuses to quit

"11m vehicles worldwide involved
"Exec says Volkswagen 'totally screwed up'
"Angela Merkel calls for complete transparency
"Company sets aside a6.5bn for costs

The defiant boss of Volkswagen has refused to resign despite an escalation of the the emissions scandal following the admission by the world's second largest car marker that 11m vehicles worldwide have been fitted with a defeat device designed to cheat emissions tests.

Martin Winterkorn appeared in a video to insist he was "endlessly sorry" for the events at the end of a day in which VW was forced to deny a report in Germany that he will leave as chief executive this Friday, to be replaced by Matthias Mi1/4ller, the chairman of its sister company Porsche.