hi,
this can be a tricky job to do but here goes....
1, remove pen holder in front of gearshift (lever out each side)
2,remove 2 torx 25 screws at the bottom of the climate control module (called a CCM ,its the big unit with the temp controls on it).
3, heres the tricky part... you pull the bottom of the CCM outwards on a angle untill you can get a couple of fingers under each side of the bottom of the CCM then you need to pull the entire CCM unit outwards while keeping it on a angle.
4,it will be tight to pull out but hopefully it came without breaking the 2 spring metal tabs that held it in place.
5,disconnect the CCM (make sure ign key is off first or this will cause trouble codes to be introduced).
6,you will now need to find the bulbs on the CCM and replace them, this may require some dissasembly of the CCM, the bulbs come as part of a coloured holder which has a straight slot on the back to unscrew half a turn with a small screwdriver.
7,put it all back together.

good luck.

steve.