Which action should NOT be performed after coupling a trailer?

Driving away without making final checks is an action that should definitely be avoided after coupling a trailer. Before departing, it is essential to ensure that all connections are secure, the brakes are functioning properly, and that the emergency brake system is verified. This is crucial for safety on the road.

Checking the connections and brakes is vital to prevent potential accidents or equipment failure. Ensuring the landing gear is retracted is also important, as failing to do so may cause damage to the trailer or the towing vehicle. Lastly, confirming the emergency brake system is operational ensures that additional safety measures are in place in case of a failure of the primary braking system. Thus, skipping these important safety checks could lead to serious consequences.