Yes, pull off trim in front of gear stick, followed by side panels. This will reveal 3? screws either side of the unit which when out will allow the whole unit to be removed. As per the video @Sphinx posted...
I wouldn't bother replacing, his Kenwood unit has the auxiliary button and therefore should have the auxiliary input in the back. Confirm the input is there and then buy the auxiliary input adapter that I posted from Trade Me, just like that Bob's your Uncle.
Confirm the auxiliary input is there while you have the unit out and before buying the adapter...