Apparatus and method for protection against overheating of vehicles

The invention relates to an apparatus and a method for protecting vehicles against overheating. There will be described a control unit for a vehicle. The vehicle comprises a trailer coupling for coupling the vehicle with a trailer. The control unit is configured to determine whether the vehicle is towing a trailer. Furthermore, the control unit is adapted to limit a rotational speed of an engine of the vehicle when it is determined that the vehicle is towing a trailer.