What is the first step in performing a pre-trip inspection?

The first step in performing a pre-trip inspection is to check the vehicle’s documentation and registration. This step is crucial because it ensures that the vehicle is legally compliant and in good standing for operation on public roads. Verifying the documentation includes checking the vehicle's registration, inspection sticker, and insurance verification. This not only helps to avoid legal issues but also confirms that any maintenance or required inspections have been completed, which is essential for safe operation.

The other options, while important for a comprehensive pre-trip inspection, are procedural steps that should follow the initial verification of documentation. Inspecting the engine condition, testing the brakes, and filling the fuel tank are all significant for ensuring vehicle safety and functionality, but these actions are more effective and responsible when taken after confirming that the vehicle is legally and properly registered and documented. This sequence establishes a foundational level of assurance before moving on to the technical aspects of the inspection.