If you are having problems twisting the rings, hold the silver bezel in place with your hand and pop
the black centre disc out by levering it with a screwdriver. Once the centres have been popped out
the bezels are a lot easier to turn as they can deform to get over the internal locking clip.

Under the centre cowl are two Torx screws, undo these then pull the cowl towards you to remove it.
There are four clips where they attach, removal will reveal the radio mounting points.

There are eight Torx screws to remove to be able to release the radio. Four are
around the radio, two hold the cubbyhole and a further two hold the button bank.
The button bank holds the cubbyhole and the cubbyhole holds the radio.

Pull the radio forwards and disconnect the 2 connections from the area indicated below.
On the other side is the aerial connection which just pulls out.

 

You will now be able to pull the radio out of the dashboard.

Radio 6

The Radio 6 removal is exactly the same as above but the double DIN size of the stereo
means that you won't have a cubbyhole. Instead, once you have removed all the screws
and the button bank, the stereo will be able to be removed and disconnected.

The Radio 6 has different connections on the rear.