just come through Austria from the German border, make sure you keep on the motorway and stopped at the main service area where you purchase the go box. €5 for the box and minimum charge is €75 for toll fees. Going to italy via Innsbruck and south of Innsbruck box started to beep twice (normal is once when going under gantry) stopped at next station and box checked and had €30 left on it but tried to tell me needed to add another €75 (minimum allowed) said no thanks. Got to italian border ok. Then you have to send your log book and proof of Euro 5 for emissions. Showed at time of purchasing box but you have to send to a designated office. Took pictures on iPad and sent by email after two days confirmation back that documents ok. Now have a go box which will not be used again as won’t bother with Austria, good job i carry original letter of conformity which shows euro 5. Hope this helps anyone thinking of going through austria.