I'm in the middle of changing my font offside fog lamp. I noticed that it wasn't working after buying the car. If you get at eye level with the lamps, you will see 3 plastic clips along the front off the grill. Remove these by turning them a quarter of a turn to the left. You could use pliers, but I just used my hand. Next, remove the small trim from the side of the lamp, which just pulls off from the right (for the offside lamp) then there are 2 allen bolts which are about 4 mm to remove. That is it, apart from disconnecting the wiring, which is straightforward.