What applies to the operation of vehicles with regard to the height of the vehicle, including the height of the load?

You answered correctly. When operating a vehicle, it is important to know the height of your vehicle, including any load that raises the total height. First, you should check the vehicle height as listed in Part I of the registration certificate to know the empty vehicle’s height. Second, if you carry a load that is higher than the vehicle’s roof, you must measure the total actual height, as the load can make your vehicle too high for certain routes or bridges.

Additionally, while there is a general rule in Germany that vehicles should not exceed a height of 4 meters (not 4.5 meters), the key requirements are to always know your actual height and to avoid routes where height limits are posted that your vehicle would exceed. This ensures road safety and prevents accidents, such as hitting low bridges or overpasses. Always check both the official vehicle height and recalculate if you have loads on top.