Hello Charles,
Welcome, and thanks for joining.
My first port of call would be to visit - not ring - your local dealer and ask the stores chap if he could help with a print out of the build record against your VIN - just take in your V5, if you have confirmed V5 Vin and actual are the same.
This should give you an insight into whether the vehicle was built with this facility or not.
Kind regards,
Gareth.