Well something is causing an issue in my fog lampA software update on most cars will enable it, seems to be hit and miss with what Fiat decide to do.
Personally don't feel the need for them on my Bravo with its OEM HIDs, but we're effective the other evening in Andy Monty's EVO with standard headlights when coming back from a meal out.
I can't see cornering lights causing issues with the foglamp housings, they're hardly on long enough to produce any decent heat.