It’s all about the VIN. When coming across the border the buyer probably said it was made in Germany so the customs officer would have assumed not NAFTA so duty “to be applied”.

But that can be appealed because first digit in the Vin is a 1. That denoted manufactured in USA so it’s a duty free cross border transaction.

I assume that Chrysler applied some finishing touches here to make it “made in North America” or they’re big enough to just make it so.

At least that’s my understanding but I could be wrong. If you’re importing to Canada go to the Canadian Government RIV site. It lists the details for duty free and the years, makes and models you can bring over.