In 1915, with his company Cewe-Films, and in 1920/21, with Carl-Wilhelm-Film GmbH, he also operated as his own producer.
In 1917 and 1918 he made a number of films in Hungarian.
He was a prolific German-Jewish film director, film producer and screenwriter of the silent film era, at the end of which his career apparently entirely faded away and he vanished into obscurity.
Carl Wilhelm remained a sought-after director until the end of the silent film period. He then ceased to work almost entirely - he is last heard of as a production assistant in 1935.
He left Germany for Vienna after the coming to power of the Nazi party in 1933 and, already ill, joined his son Wolfgang in London where he died in 1936.