In case of a breakdown or a mechanical problem you have to call the car rental company which will solve your problem as soon as possible. Moreover, in case of an accident you should contact the police and your road assistance company.
The prices have been modified since the last time I visited the website.
The prices may be modified and adapted at any moment, even during the same day, depending on the completeness and availability of cars. Make sure you book early in order to get the lowest price.