What device on the trailer will not function if the electrical connection to the towing vehicle is missing or interrupted?

The selected combination correctly identifies the electronic braking system (EBS) and the lighting system as dependent on the electrical connection between the trailer and the towing vehicle. According to German traffic laws, the EBS is crucial for safe braking performance and activates based on signals from the towing vehicle. Likewise, the lighting system ensures that the trailer's lights function properly, which is essential for visibility and signals during driving.

Both systems are vital for road safety, and if the electrical connection is interrupted, these devices will not operate, increasing the risk of accidents. It is important to understand that all relevant components that rely on the electrical connection must be considered to ensure the trailer's compliance with traffic regulations and overall safety. The traction control system (TCS), while important for vehicle stability, does not typically rely on the trailer's electrical connection in the same way.