Why are you required to have a defective exhaust system repaired immediately?

Since your answer aligns perfectly with the correct one, let's break it down:

1. Noise Pollution: Under German environmental protection laws, vehicles must adhere to noise limits. A defective exhaust system can result in excessive noise, which is considered a public nuisance and can lead to penalties.

2. Safety Hazard: Parts from a damaged exhaust system can fall onto the roadway. This situation not only jeopardizes the vehicle's safety but also poses risks to other road users, potentially leading to accidents.

Both points highlight why immediate repair is necessary, as it's essential for maintaining vehicle safety and compliance with environmental regulations. Ensuring that your exhaust system is in proper working order is vital for the protection of both the driver and the community.