Anyone that has done this? Is there a tutorial anywhere maybe?

I did mine a few years ago to replace with LEDs. 

 

As far as I can remember, you need to tilt the mirror glass inwards as far as possible and then get your fingers or a plastic tool around the back of the mirror glass and prise the mirror out.  There is a plastic backing to the mirror.  Just be careful not to break the glass.  Once the mirror is out, you can then see how to replace the bulb.

See this thread, reply number 3: http://www.briskoda.net/forums/topic/233709-how-to-replace-puddle-light-bulbs/

 

I'm not surprised you had to ask - there is nothing in the owners manual (at least not my one) that covers replacing these bulbs.

Very easy.

Move mirror all the way up to get a gap at the bottom. You can then access the bulb holder to pull it out. Some say you need to remove the mirror but you can do without doing so avoiding the possibility of breaking the mirror! A pair of long nosed pliers may be needed if you have big fingers.