The proportion of electronics in vehicles has increased continuously in recent years. A development in which HELLA has long played a special role as an innovation leader in the field of automotive original equipment. The independent aftermarket also benefits from this long-standing original equipment expertise with the successful transfer of its OE know-how. HELLA's high level of expertise is also reflected in the high-quality production of the trailer connection units. In alignment with the lights of the motor vehicle, they reliably control, coordinate and monitor all lights of the trailer, which increases safety and at the same time enhances driving comfort. The optimised short-circuit concept and the compatibility with all light sources, whether LED or classic incandescent lamps, ensure a particularly high functionality of the trailer connection unit.