Wide Angle Euro Mirror:
Turn the driver side mirror to full right side position.
2> Slide your fingers behind the
left side of the mirror and pull to remove the mirror (requires some
muscle). Don't pull too hard since heating wires are still connected.
3> Remove the power and ground wire.
4> Easiest way to get the mirror to go into the
"slot" is turn the mirror to left position, slide the right
side of the mirror into the slot so it gets "stuck", then
holding mirror, turn the mirror to full right side position.
Hold the right side of the mirror in it's place and push the left side
until it snaps on to place. (requires some muscle)
Wide Angle mirror makes a huge difference, highly recommended.
from Borton Volvo's website