Vehicle rear light, system and method for manoeuvring assistance of a vehicle

The rear light (10) of a vehicle (1) comprises a reversing light (22) arranged in a housing (21) and may also include a reversing sound alarm (23) associated with the housing. A control unit (30) housed in the housing receives from a distance sensor (24) data corresponding to the distance (d) separating said sensor from a surrounding element (25). Based on the distance data, the control unit: - can generate a signal S1 to control the frequency of the sounds emitted by the reversing sound alarm; - generates a signal S2 controlling an indication device (36) making it possible to generate a signal S3 detectable by a vehicle management system (20), allowing the driver to access the distance data d.