As well as the digital panel you need the complete heater box (inc blower, stepper motors, sensors) and its 2 sub-harness, sunshine and external temp sensors.

Bit of wiring needed but generally its simple to do, just a bit 'long winded' if its all your doing. Virtually everything from the front seats forward in the cabin has to be removed to change the heater box, and the a/c & coolant obviously has to be emptied and refilled. It can be done in a very long day, but I usually spread it over two.

Though I've done it myself and advised others, the second time I did it the easy way, bought a car with it already fitted.

Martin