GDW Swan Neck Towbar - Audi A4 Avant (B9) 2016 Onwards

Single 7-Pin Socket:  Provide power to trailer road lights (Tail Lights, Stop Lights, Turn Signals, Foglight, Number Plate Lights and any Side Marker Lights). Typically used on trailers, and caravans manufactured before 2012

Universal Aftermarket Wiring Kit:  Towbar socket connections are spliced into the vehicle wiring loom.  The kit includes any bypass relays required.