What must you be careful about, when putting on a wheel?

Your answer is correct because when putting on a wheel in Germany, it is important to tighten the wheel nuts using the prescribed torque to ensure they are secure but not over-tightened, which could damage the wheel or studs. Additionally, tightening the wheel nuts in an alternative or cross pattern ensures an even distribution of pressure, preventing the wheel from being mounted unevenly. Checking the wheel nuts only after driving 500 km is not sufficient on its own; the initial proper tightening and pattern are essential for safety right from the start. Following these steps helps prevent accidents caused by loose wheels.