"The earlier - the more economical"
To get a discount for a future booking, it's just enough to make a reservation several months in advance.
Amount of discount:
From 2 Months - 20 Euros
From 4 Months to 40 Euros
From 5 Months to 50 Euros
From 7 months to 70 Euros
From 9 Months - 100 Euros
* You can get discounts only if you book a car for at least 5 days or in case of prepayment