Its pretty easy but you need small hands. You have to remove the windscreen washer bottle first by unclipping it and pulling it upwards. This will give you much more room to work. Then remove the circular black rubber cover from the back to the light. You will then see the bulb holder with wires protruding. Turn this anti-clockwise to release...it can be quite difficult as it has sharp edges. Take out the old bulb and replace it....do not touch the glass on the bulb. Put everything back....the washer bottle just cpushes back down again. Sounds complicated but i managed to change one on the side of the road in a couple of minutes and I'm no mechanic.
Rob, December 2007