Yesterday I took the car back to main dealer after two rear punctures with less than a 1000 miles on the clock. Whilst booking the car in the service reception girl was able to tell me the exact tyre pressures from her desktop PC. This must mean they can interrogate the car wirelessly even whilst it is stood in the car park never mind using the OBD socket.
With all the various sensors in the car you do wonder what else they can glean remotely, I am just glad I am past having a back seat bonk and getting a knowing wink every time it went in for a service.
Richard