PiriPiri,
If there are no shops on Saipan that have the MB SDS system, about your only possibility would be to try one of the made in China
knock off diagnostic systems and hope that it can read the Body Control Module.
How did you get a Sprinter into a part of the world where there is no possibility of repair?
Sorry we can't be of greater help, but it takes the right computer and software to communicate with the Sprinter's on board computer systems.
Roger
P.S.
Have you tried this place?
Mercedes-Benz service - Oceanworks
saipanfix.com/
Oceanworks provides complete Mercedes-Benz service, including engine, transmission, electrical, and interior repairs. ... No one else in Saipan has this system.
Sounds like they might have a diagnostic unit that can communicate with your Sprinter....worth a try?