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 crucial to avoid applying the clutch because of two main reasons:

1. The braking action of the engine is important for controlling speed. When you disengage the clutch, you lose this engine braking effect, leading to potential over-speed and reduced control of the vehicle.

2. Relying solely on the brakes can cause unnecessary wear. Continuous braking can lead to brake overheating and decreased effectiveness, which can be hazardous, especially on steep descents.

In German traffic regulations, it's emphasized that drivers should maintain control of their vehicle while managing speed effectively, especially in challenging driving conditions. Understanding the importance of these factors helps prevent accidents and prolongs the lifespan of the vehicle's braking system.