What does a comprehensive vehicle inspection typically include?

A comprehensive vehicle inspection is crucial for ensuring the safety and proper functioning of a commercial vehicle. The correct answer highlights that this type of inspection includes checking essential components like brakes, tires, lights, and fluid levels, which are critical for safe operation on the road.

Brakes must be examined for wear and proper functionality, as they are vital for stopping the vehicle effectively. Tire condition and pressure are essential for maintaining traction and stability during operation. Ensuring that all lights, including turn signals, brake lights, and headlights, function correctly is important for visibility and signaling to other drivers. Fluid levels, such as engine oil, coolant, and brake fluid, must be checked to prevent mechanical issues that could lead to breakdowns or accidents.

In contrast, the other options, while they may contribute to the overall appearance or comfort of the vehicle, do not impact its operational safety as fundamentally. An interior cleanliness check and examining the paint condition are related to aesthetics rather than function. Checking the audio system, although it might enhance driver comfort, is irrelevant to the vehicle's performance and safety during operation.

Thus, understanding the importance of checking critical vehicle components ensures that drivers maintain safe and reliable vehicles on the road.