You want to tow a brake-equipped trailer. Where can you find details or guidelines on the permissible towable mass of your car?

You answered correctly. The permissible towable mass for your car—the maximum weight of a trailer your car can tow—is listed in the registration certificate Part I of your car. This document contains technical specifications, including the authorized trailer weight with and without brakes. The trailer’s own registration or insurance certificate does not provide information about the towing limits of your car. Always check your car’s registration certificate to ensure you stay within legal limits when towing. This rule helps ensure road safety and prevents overloading your vehicle.