Using VAG-COM, I had enabled my fog lights as corner lights ( AudiEnthusiasts Vag Com ) but couldn't figure out if it was working until now. I was expecting that when I turn on my directional light, the fog light will turn on; but that is not the case at all. In 2011 A5, fog lights as corner light will work if your head light is turned on AND if you turn the steering wheel to right or left. Turning your steering wheel right or left will automatically turn on the fog lights as the cornering lights. Turning on the directional lights, by itself, will not turn on the fog lights as cornering lights.