Audi Q5   Self-help   Fuses and bulbs  Changing bulb for front fog lights
Fog light removed: Bulb holder is highlighted
Fig. 1 Fog light removed: Bulb holder is highlighted
Carefully turn the bulb holder anti-clockwise and take it out of the housing Fig. 1.
Take the bulb out of the bulb housing.
Fit the new bulb.
After changing the bulb re-install all parts in the reverse sequence and check that the bulb is working.