MerlinsGarage

If you have PDLS.

From the Owners Manual:

"Fog lights The distribution characteristics of the driving light change when the rear fog light is switched on at vehicle speeds below approx. 43 mph (70 km/h).
The light beam becomes wider and reduces glare".

John 996 TT Cab

The pull out button on the headlight switch is for rear fog lamp. The front headlights "diffuse" when the system detects fog to reduce the glare. No separate fog lights any more.

kosmo

on the Cayenne: 1st pull engages the front fogs. 2nd pull engages rear.

mtony

As far as I can tell, there is only a rear fog light that turns on by pulling the light switch when in the full clockwise position. Doesn't work in any other position.