The sign "Risk of slipping or sliding" is a warning sign used in Germany to indicate that the road may be slippery, particularly in certain weather conditions. This could be due to rain, ice, snow, or the presence of oil or other slippery substances on the roadway.

When you see this sign, you should be cautious and reduce your speed, as traction may be compromised. It's important to increase your following distance from vehicles ahead and be careful in your maneuvers, especially when braking or turning.

Always pay attention to other conditions such as weather and road surface, and adjust your driving accordingly to maintain safety.