Hi Shao_khan,
I have never been able to change the NSF headlamp bulb. I have easily changed bulbs on other cars, but there is just not enough room for my large hands on my A2. I did try for at least an hour, and I was just about able to get the bulb out, but all I managed to do was steam up the inside of the headlamp with my breath.
I now have a set of Torx head screwdrivers ready for when the next bulb goes.
John.