I believe what BigDave meant was to be careful as harsh as it may sound. These kind of situations can get yourself into more problems further down the line, I did see the Mercedes thread also, Motability were insisting to return it even if it was a “mistake” from the dealer’s end.
Of course, your conscience is clear but the way your post came across sounded like you wasn’t aware of your spec. Sometimes dealers do tend to double cross you by putting in a complete different order and spec etc and members still continue to keep the vehicle but legally on paper it’s written something else! We’ve witnessed alot of this and still happens to this day. Nonetheless, great looking spec and deal you’ve got there! Congrats!