What should you anticipate in this situation?

Your answer is fully correct. In this situation, anticipating that the motorcyclist will slow down and that the tractor will proceed onto the road is crucial for safe driving.

According to German traffic rules, drivers must always be alert to the actions of vehicles ahead and vehicles potentially entering the road, such as tractors leaving a field or side road. Motorcyclists often reduce speed before turning or maneuvering, so expecting the motorcyclist to slow down helps you adjust your speed accordingly and maintain a safe following distance.

Similarly, tractors may move onto the road from a field or a side path without a priority sign, so anticipating that a tractor could proceed onto the road ensures you are prepared to yield or brake if necessary.

This anticipation helps prevent accidents by promoting defensive driving and smooth speed adjustments, keeping the traffic flow safe and controlled.