When we arrived the Budget attendant saw that I had young children but did not offer booster seats for them. In the USA they would not need the seats, but in Europe apparently they do. That lesson cost us 436 Euros and loss oh half our vacation in Salzburg. The Police were even outraged that Budget would allow us to leave with out proper booster chairs. I understand that we are visitors and we should have done research on the booster seat requirements, so we do take some of the blame. I have tried to contact Budget to see if they would at least reimburse me the rental, which was half the cost of the fie, but they have denied my request. I will not rent from Budget/Avis again.