You want to couple a trailer to your car. Where will you find details about the maximum permissible vertical loading of your car?

You are correct. Information about the maximum permissible vertical loading (Stützlast) for your car can be found in both the operating manual and the registration certificate Part I (Fahrzeugschein). The operating manual is provided by the manufacturer and contains technical specifications, including limits for trailers. Registration certificate Part I is the official document for your vehicle and also lists important data such as the maximum allowed vertical load. Registration certificate Part II, on the other hand, is mainly used for vehicle ownership information and does not contain these technical details. Always check both the manual and registration certificate Part I before attaching a trailer to ensure safe and legal operation.