Final answer:
When parking on a level surface, engage the parking brake and turn off the engine. Vehicles with automatic transmissions should be placed in 'park', and those with manual transmissions should be placed in gear.
Step-by-step explanation:
When parking your vehicle on a level surface, you should engage the parking brake, turn off the engine, and if applicable, place the vehicle in 'park' if it has an automatic transmission or in gear if it has a manual transmission. This procedure helps to ensure that your vehicle remains stationary on the level surface and prevents it from rolling. It's important to take these safety precautions to avoid potential accidents or damage to the vehicle.