we are travelling around south america for the moment and due to a problem with a cable our radio has been blocked. We phone to the US dealer but to give the code he has to see the car, which is impossible without the end of the trip (1 year) please help us: here is the info: type of car: Volkswagen Vanagon 1988 serial number :WV2YB025JH062640 reference on the radio (premium audio): VW Z5Z7N0606709