They can be a little hard to get to.
Just undo the bold holding the coolant bottle in place, lift it up and move it above the extractors (make sure they are cool and keep the bottle upright)
Then undo the big black nut on the back of the headlight cover (might be hard as the plastic has sealed, use a bit of muscle). You will need to use bit of force to get it around the air con pipes.
Remove black rubber and unhook the bulb, you will need to put a bit of pressure on it and bend it under the aircon pipes. Now remove blub (make sure you dont touch the glass on the new one).
Ive done it this was like 5-6 times and works everytime.