Which braking technique must a bus driver apply to prevent the harsh rebound jerk (Ausfedern) of the vehicle chassis just before coming to a complete stop?

1. Maintaining maximum brake pedal pressure continuously until the vehicle completely stops rolling
2. Applying degressive braking by progressively releasing brake pedal pressure just before vehicle standstill
3. Engaging the parking handbrake at 10 km/h to assist the service brakes
4. Switching the retarder to its highest stage immediately before stopping