Rear view aid for a vehicle set

The aid has a camera (4) for detecting a rearward surrounding region (6) of a vehicle trailer (5). A display device displays image information supplied from the camera. The display device comprises a display surface that serves as a substitute for a rear mirror (2) arranged in inner space of the car. A display e.g. LCD display, is arranged in inner side of the car. A processing device is provided for processing the image information from the camera, where a radio connection is provided between the camera and the display device.