We have now bought one in Stg 2 months ago following the advice that with a Chilean car we could travel all SA countries without any major problems.

Unfortunately we faced some challenges along some borders to which we get no reliable information in other forums and would thank you so much for anyone's help..

A week ago we wanted to cross the border from Arica to Tacna. There we were rejected by the Chilean Authorities, because we are foreigners and have no residence in Chile (this seems to be new).
Since we were already once in Bolivia with the car, we decided to go to La Paz and enter Peru through Bolivia and later reenter Chile through Tacna/Arica.

Both Bolivian and Chilean Authorities said it would be ok but our experience says that the information is not always correct. Forums and Blogs also give contraditory info.

We post our issue here with the hope someone can give or share any experience and know if our intinerary Bolivia/Peru/Chile is viable or not.

The car documentation is all right, besides that they contain only the five last numbers of the chassis. This caused some probems at the Bolivian border in Chungara/Tambo Quemado, but seems to depend on the official's mood. In Ollague they even not look at the car.

We left Chile and are now in Bolivia and  have the document (declaracion juramentada) for the temporary stay of the car in Bolivia. Concretely our questions are:
- Can we leave Bolivia to Peru without any problems? 
- What happens to the declaracion juramntadata in the border Bol/Peru, since this seems to be valid only between Chile and Bolivia? 
- What papers do we get entering Peru?
- Do we get into Chile via Tacna/Arica, and finaly,
- Did anyone have the issue with the chassis number?

We will still stay some days here before heading to Peru and would appreciate very much any info provided.
Thank you very much
Edmundo and Robert