Firmly grab ahold of the gearshifter surround and lift up.
Place aside and don't forget to disconnect the A/C control ribbon cable.
Then using a phillips screwdriver, remove the screws holding down the centre console.
Next, open the cubby and lift the rubber mat from the front to reveal the two small screws holding down a little coverplate.
Once removed, you will see the two screws that hold the upper part of the centre console in place.
With them gone, you can then gently pull the centre console from behind the triple gauges away from the dash.
Be aware that there is a cable that connects to the triple gauges which needs to be disconnected.
You should now have the centre console off the dash.
Here should be four screws either side of the HU which keep it attached to the console.
Unscrew these and you should have the HU in your hands.
Finally after having removed the HU, open your bin and place HU within.
Then follow this thread on how to install an aftermarket HU
viewtopic.php?f=27&t=16403