Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to free a frozen parking brake [title] Start the car to allow it to warm up. [step] If ice is preventing the release of your parking brake, warming up the car can help melt the ice and free the brake. Start the car and leave it running for at least 10 minutes before attempting to release the parking brake.

Ending1: [title] Inspect the parking brake and cable for ice. [step] The parking brake is connected to the brake shoe on one of your tires by a thin black cable. Ending2: [substeps] Another option if the parking brake has a cold setting is to use a loose pull-down button. This will help to keep the parking brake loosened and cool down the car until the vehicle completely warms up again. Ending3: [substeps] Before attempting to release the parking brake, prop open the hood of the car with one hand and tilt the lower right rear tire forward slightly to allow the room to release more of the ice. Continue doing this for the rest of the vehicle until the ice is completely gone. Ending4: [substeps] Your standard parking brake should never be warmed up. However, it may be far more convenient for some drivers to warm up the brake in the event an accident occurs.

Answer format: ending1/ending2/ending3/ending4