<span style="color: #222222;">German prosecutors said they had charged former Audi chief executive Rupert Stadler with fraud over the Volkswagen subsidiary's role in the "dieselgate" emissions cheating scandal.<br />''<br />''Professor Rupert Stadler and three other defendants are accused of fraud, falsifying certifications and illegal advertising. The case is linked to over 430,000 Volkswagen, Audi and Porsche cars fitted with "defeat devices" to fool regulators' emissions tests.</span><br />