OK, dann noch ein wenig off topic:
The car periodically polls Tesla for an updated supercharger list. This is up to the car, but seems to be about once or twice per day. It's saved as a JSON file on the CID.
For outages, the car polls Tesla periodically (few times per hour it looks like) for affected stations within driving range of the current location by specifying the id#s of those superchargers it wants to check the status of. Generally the response is nothing.