Slovenian check point

As we tried to cross the border into Austria, we were stopped by the Slovenian police. We found out that you need a sticker in your windscreen to show that you have paid for driving on the motorways. A kind of toll. We were blissfully unaware, but as he explained the 600 euro fine, we became very stupid and apologetic. Eventually he let us off and we were shown where to go and buy the ticket for Austria (same rules there for the motorways). The car next to us was not so lucky and the car was duly photographed and the occupants fined. With our lucky escape, we head through the 8km tunnel back up into Austria.