Your bus has a permissible total mass of 4 t. What must you carry?

You answered correctly. If you are driving a bus with a permissible total mass of 4 tons, you must carry a powerful torch and a warning triangle along with a warning lamp. These items are required by German traffic regulations to ensure you can secure your vehicle and warn other road users in case of a breakdown or emergency, especially at night or in poor visibility. Carrying 50 litres of reserve fuel in cans is not required and can even be dangerous due to fire risk. Always remember to have the necessary safety equipment on board for emergencies.