Retrofit system converts existing diesel engines to run on 90% hydrogen
The retrofit system keeps the diesel injection system, but adds hydrogen injection directly to the cylinder
German court rules that VW must buy back 60.000 diesel vehicles
“Volkswagen is now seeking to bring these proceedings to a prompt conclusion in agreement with the plaintiffs"
Audi chief Rupert Stadler arrested in diesel emissions probe
Munich prosecutors said Mr Stadler would be questioned by Wednesday