If you do not regularly exchange the air filter, what effects does this have on the engine?

Your answer included all relevant effects of not regularly exchanging the air filter, which is essential for maintaining an engine's performance. According to German traffic regulations, vehicle maintenance is critical for safety, environmental standards, and efficiency.

Neglecting the air filter can lead to several issues:

1. An increase in harmful substances in exhaust gases can create environmental hazards and violate emissions standards.
2. Increased fuel consumption directly affects the vehicle's efficiency and can lead to higher operating costs.
3. A decrease in engine power affects overall vehicle performance, which may compromise safety and handling.

Therefore, understanding the impact of vehicle maintenance, including air filter replacement, aligns with the importance of complying with transport regulations in Germany to ensure both safety and environmental protection.