OK -- Assuming it is the same as my slightly later model:
- Take off the circular plastic protector from the rear of the assembly, to expose the plug connector attached to the back of the bulb.
- Ease the plug off the bulb.
- The bulb is held in place by a wire clip. ABOVE the bulb, push the looped ends of this clip sideways in opposite directions (i.e. away from axis of the bulb). This will push the looped ends off the metal T-piece which was hoding them in position.
- With the ends of the clip now free, it will pivot downwards and release the bulb.
(First time I had to do this it took me ages to work it out. If you have a torch and get your line of vision down as low as possible under the bonnet you can just about see the ends of the clip and how it's held in place.)
Jim D
January 2008