Who is required to indicate a change of driving direction here?

In the scenario shown, all vehicles—your vehicle, the red car, and the motorbike—are required to indicate their change of direction. According to German traffic regulations, any driver changing direction, whether to turn left or right, must signal to inform other road users of their intentions. This is crucial for ensuring safety and avoiding accidents, as it allows other drivers and cyclists to anticipate the movements of vehicles around them. Signaling helps maintain a predictable flow of traffic and promotes awareness among all road users.