So what you are saying SteveMfr, is that I have one fitted but it is not activated? (Because my MFD only shows Aux. Ventilation)

And that I would need some loom and a trip to T4 provider(or other diag tool) to get it activated? 

Have "RSW All Comms" in Hampshire - happy to help

Current Combustion Engine Transports:
Range Rover 2002 TD6 HSE Alveston Red, Sand Leather
Audi 2004 Cabriolet Sport 3.0 (Amulet Red)
Mazda Eunos 1990 (Brilliant Red)
MG Midget Mk 1 1962 (undergoing restoration) (to be Nightfire Red)

You have one fitted but it functions only as an additional heater.

To make it work with park-heat function, you need to have the CCF edited. I'm pretty sure the T4 can not do this (I don't remember due to brain rot). You'll need BBS Faultmate, an Autologic, or wait another couple of weeks and buy an IIDTool (or buy an IIDTool now and wait for the FW update).

No loom necessary. If you want only the timer, it will be there as per the pic in this thread. If you want the remote, you need the receiver and sender. You'll have to check which plug you have on a 2002 - there os an older version of the remote and a newer. The plugs are different.

All of this is in various threads with 6x10 color glossy photographs and circles and arrows and explanations on the back explaining what each is about.

Search FBH, remote, and use my UN or Dan's. 
RRC 2Dr, RRC 4Dr,
P38, and LM
(wife thinks I'm nuts - prob right, too)