I dont think theres any law that says youre not allowed to leave a country unless you bring with you the vehicle you brought in with you. I have never heard of anyone that had been denied leaving a country just because they arrived into the country with a foreign vehicle. Have anyone else heard or know about persons who really and truly have been denied leaving a country for this reason?

I flew out of Chile while my norwegian plated bike was still in the country and I was worried as it was mentioned on the paper slip you get on arrival in Chile and have to return when leaving the country. But it was never any problem. The Immigration dont even look at those slips, they just collect them in huge amounts when people bords their airplanes and passes through immigration.

I was also very worried 1,5 years ago when I planned to leave Australia while my bike (still norwegian plated) stored away for a while and fly home for christmas. Several people said this would be illegal and that I was to be stopped at the airport. I even got pms about "secret" ways of doing this without being spotted. I decided this was just to stupid so I sent a mail to Australian customs and asked for advice. And they replied me and said of course you can leave your vehicle while leaving the country for a while. They only wanted a mail with where the vehicle would be stored and when I was to leave and when I was to be back. And then another mail when I was back so that had all relevant info.
So that was easy peacy - the australian customs even sent me a mail stating that: "You have now fulfileld all requirements from us while leaving your vehicle behind in the country for a while, have a nice trip and welcome back!"
Or something like that, it was quite hilariou actually...

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In the end everything will be fine. If its not fine its not the end....