We are 2 Belgians , bought and registered our car in Santiago in December and travelling around. Now recently we,ve got 2 times problems at the border leaving Chili. On the 30/01/2017 when we were heading to Ushuaia and on 13/02/2017 when we crossed in Cerro Castillo from Puerto natales to Calfate.
On both occasions the customs wouldn't give us permission to leave Chili. There must be a rule which say that foreigners who are not registered as residents are not allowed to leave the country with their car. A domicilio or having a RUT is not enough.