Which driver assistance systems do you have to manually activate to assist you in specific situations?

You are correct in identifying that both the active park assist and the adaptive cruise control (ACC) need to be manually activated to assist in specific situations. According to German traffic rules, these systems are not always on by default; the driver must switch them on to use their assistance features. The active park assist helps with parking maneuvers when activated, while ACC assists with maintaining a set speed and distance from the vehicle ahead but requires manual activation to start. On the other hand, the emergency brake assist is a passive safety system that works automatically in critical situations to help prevent collisions and does not require manual activation. Understanding which systems need manual activation helps ensure you use driver aids appropriately and safely.