Re: Hey Alfa Heads
Wrinx is right. Also to change the glass the trim under the headlight has to come off. Once the indicators are off (they also have a plastic lever that I think you push towards the wing to release the unit), you will see a 10mm bolt that holds the end of the trim. Undo that and the trim will pull off. It's held by push-in studs.
The glass can be done with the lamp still in situ....just remove the clips that go around the edge of the glass.
The bulbs are not to bad to change. You might find the sidelight bulb has burned itself onto the plastic. I got a small file and filed away all the excess melted plastic until I could insert the new bulb properly.