Why should you not apply the clutch when driving on a long, steep downhill slope?

When driving on a long, steep downhill slope, it's important not to apply the clutch because:

1. The braking action of the engine is lost: When you disengage the clutch, the engine is no longer connected to the wheels, meaning you lose the engine's natural braking effect. This is crucial on a downhill slope where controlling speed is important.

2. Unnecessary wear on the brakes occurs: Relying solely on the brakes instead of using engine braking can lead to overheating and excessive wear of the braking system, which can reduce their effectiveness and increase the risk of brake failure.

The combination of these two points is essential for safe driving. It adheres to the guidance that emphasizes maintaining control of the vehicle and minimizing wear on components. This understanding aligns with the principles outlined in German traffic regulations, which prioritize safety and vehicle maintenance.