Well I did it, Posted photo's in my garage of removing the mirror glass base. Very different to the one in my manual. I have removed the old mirror glass and left it off for the photo's to make it clearer how it fits. RHS D40 2008
Adjust mirror glass so bottom RH corner is open as far as possible.
Difficult to see, but looking up diagonally towards the centre, you are looking for one of the 4 nibs with 2.5mm hole in on the motor base.
Place the blade screwdriver between it and the slot in the glass base and twist, "DO NOT" apply any pressure to the glass at the corner (flexing it) with the s/driver.
Gradually push the s/driver in a little further and twist again, repeat untill it comes away.
See photo's, size of screwdriver there too.
OOPS, There in the gallery. I'll try again.
Here we are. Now use this link
http://flic.kr/ps/ZPvmM
Photo's now include how to gain access to the puddle lights, and indicators.