Which dangerous defects can have occurred on a trailer with overrun brakes which has been parked for some time?

The combination of defects related to overrun brakes on a trailer includes the potential for rust affecting the brakes and defective cable connections due to inactivity. According to German traffic regulations, trailers must be in a safe and operable condition, especially when resting for extended periods.

Rust can hinder the effectiveness of the brakes, making them unreliable, while defective cable connections can prevent the proper functionality of the braking system. Both issues pose significant safety hazards, which is why acknowledging both of these combinations is crucial. The chosen option about tyre pressure, while also a concern, does not directly relate to the braking system's safety in this context and therefore is not part of the critical defects specific to overrun brakes. Hence, it's essential to recognize all relevant defects to ensure road safety and compliance with German traffic laws.