Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to quiet a noisy fan belt [title] Ensure your vehicle is equipped with a neoprene belt. [step] Most modern vehicles have a serpentine belt instead of a fan belt, though the names may be used interchangeably. Older model vehicles and some high performance applications still utilize fan belts instead of electric fans.

Ending1: Older belts were made of neoprene and would benefit from the application of belt dressing, but newer epdm-made belts may dry out as a result of using belt dressing. [substeps] If your fan belt was installed after the year 2000, it is likely an epdm-made belt. Ending2: [title] Press the automatic button at the top of the belt. [step] The automatic button will unlock the vehicle door. Ending3: [title] Position the fan on top of the vehicle's hood. [step] Adjust your fan to an upright position, resting it against the left side of the vehicle's trunk. Ending4: To save money, consider purchasing a larger serpentine belt instead of one manufactured with automatic or multifunctional fan belts. [title] Close all windows and doors in the vehicle.

Answer format: ending1/ending2/ending3/ending4