I have one remote with no extra buttons. Reading elsewhere i saw that I would have had some way to turn it on. I didn't so I guessed I don't have one. Does that sound right? It is an early td6,don't know if that is relevant?
Do a search ,I'm sure someone put a photo of what you should be looking for under the bonnet a couple of weeks ago. You could put in your location, there may be a member close who could help.