If anyone thinks JC had anything to do with the purchase of the car, I suspect you'd be mistaken. That kind of stuff would be sorted out by low paid researchers well before the act. The presenters would discuss with the producers what cars they want, the producers tell the researchers who go off and find the cars, then the presenters are given a small selection that have been pre-selected to the budget and then the car is bought.
No way was this done on purpose, unless after the car was bought someone clicked with the reg and they moved the filming to Argentina. Some bright spark in the press office then leaked the details to the media, and all hell breaks loose.