The sign you referred to, "Guide sign slope sign – installation on the right," indicates the presence of a slope or incline along the road. This sign is typically placed on the right side of the road to inform drivers that they are approaching an area where the road rises or descends.

Drivers should be cautious as descending slopes may require them to reduce speed, while ascending slopes may affect vehicle performance, especially with heavy loads. It’s important to maintain safe driving practices and be aware of how such inclines can impact vehicle handling and braking.

If you have any more questions about traffic signs or German traffic rules, feel free to ask!