Use of the vehicle is permitted in the following countries:
Belgium, Denmark, Germany, Finland, France, Great Britain, Ireland, Italy, Croatia, Luxembourg, Norway, Austria, Portugal, Sweden, Switzerland, Slovakia, Slovenia, Spain, the Czech Republic, Hungary and the Netherlands.
This also applies to the use of the vehicle on islands within these countries (with the exception of the Azores, the Canary Islands, Madeira and the overseas territories).
The use of the vehicle in Croatia, the Czech Republic, Hungary, Slovakia and Slovenia is only permitted with the prior consent of the rental company and against payment of a cross-border surcharge.
You can find more information
here.