What must you remember when passengers are boarding and alighting?

Your answer is fully correct. According to German traffic rules for boarding and alighting passengers, you must only activate the enabling device of automatic doors after the bus has come to a complete stop to ensure passenger safety and prevent accidents. Additionally, you must watch all directly operated doors carefully to monitor passengers entering or leaving and to avoid injuring anyone. It is not allowed to start moving while the indicator light for an open automatic door is still on because this signals that a door is not fully closed, which could endanger passengers. Remembering these rules helps ensure safe and cautious operation around passengers.