This will prevent you from being held responsible for pre-existing damage. Make no repairs on a rented car without the explicit permission of the lessor. Contact the rental office for instructions. If late at night the fan belt breaks and you can get someone to repair it for a small charge, no one is likely to object. For a major repair, however, wait until you can contact the rental office.
Charges are substantially higher when the car is refueled by the car rental company.
Please refuel prior to return.