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? .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

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 2 L322s
(wife thinks I'm nuts - prob right, too)