Well, at least it looks like the Motability paperwork matches the vehicle you have.
What you do about it is upto yourself and your conscience. Going by your other posts here, you have only had the vehicle a week or so, but you are now obviously aware that a mistake has been made somewhere along the line.
It sounds like a dealer error, but don’t forget there may be some poor soul (not necessarily a Motability customer) who may have ordered the Puma ST Line and are about to be given a Puma Titanium spec car instead. I don’t think they will be quite as happy as you are.
You may want to speak to the dealer or dealership principal about it – being upfront about the mistake may work in your favour and you have come away with a bargain – providing the incorrect vehicle spec is available on the scheme and the dealership pays the difference in vehicle cost to Motability.
The worst is that the dealership in conjunction with Motability recall your current vehicle and you get given the vehicle you should have been given. Remember you are just the lessee, not the owner of the vehicle, so it could be down to both Motability and the dealership to decide what the future pathway is.