if you have small hands, you should be able to reach down and lift the metal retaining bar at the back of the light, this will release the dust cover and splash cover to the light, carefully, unhook the cover and move it toward the radiator, you will then have full access to the bulbs, it is now just a simple bit of unclipping the light bulb spring clip and the wiring socket from the bulb, you can then remove the bulb and replace it and fit the spring clip back the, you might need to use a screw driver to pull the retaining bar back over the cover.
andrew, July 2007