Andy213: your references to the 'Consumer Guarantees Act' and the 'Fair Trading Act' and the 'Motor Vehicle Sales Act' and the 'Consumer Information Notice (CIN)' all appear to be references to New Zealand law.
In general, this site only addresses issues of US law.
More specifically: While the OP has not indicated in which US state he/she bought the car, his/her legal rights would be defined by the laws of that state and, to the extent applicable to the situation, US federal law.
New Zealand law would not apply to these matters.
Amusingly, I just bought a new car (well pickup truck) and one of the things the dealer had me initial was a statement that I knew that they weren't insuring or verifying my existing insurance.