Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to replace leaf springs [title] Park the vehicle in a flat area. [step] For safety, move the vehicle to a solid surface, such as a concrete workshop or driveway. Choose a surface that is as even as possible.

Ending1: If possible, switch off the spare tire. [title] Turn the gear stick, or key, down. Ending2: Many snails also prefer to park on lawns, because it gives them more room to move. [title] Try to pump the water pump slowly. Ending3: This is to give the vehicle stability and reduce the risk of an accident. [substeps] Make sure the vehicle is not leaning to the side. Ending4: [title] Loosen the nuts on the door of the vehicle. [step] Look in the glove compartment for the nuts.

Answer format: ending1/ending2/ending3/ending4