Firm hired 3,700 concentration camp inmates in deal brokered by the SS - Another 16,500 labourers also forced to work in Auto Union plants - New study was commissioned by Audi in 'house cleaning' exercise - Many workers were forced to live in unheated barracks, report finds - Disabled employees shipped north to be executed, according to historians Car giant Audi employed thousands of concentration camp inmates during the Second World War and was 'firmly ensnared' in the Nazi regime, an investigation has found...