What must be observed for the DEF Compartment during inspection?

When inspecting the DEF (Diesel Exhaust Fluid) compartment, it is crucial to ensure that it is mounted securely and free from leaks. This aspect is vital for the overall functionality and safety of the vehicle. If the DEF compartment is not secure, it may interfere with other components in the vehicle or could come loose while in motion, posing a risk of damage or spillage. Additionally, leaks can lead to contamination of the DEF fluid, which would undermine its effectiveness in reducing harmful emissions. Proper checks on these points help maintain the integrity of the system and ensure compliance with environmental regulations.

Other aspects, like color, organization, and labeling, while important for general maintenance and usability, do not critically impact the immediate operational safety of the DEF system. Therefore, the focus on secure mounting and the absence of leaks is paramount during pre-trip inspections.