Specific cable kit for upgrading the original electric swivel towbar for Audi A8 4N All functions will be installed as factory Scope of delivery: Cable set Note: After installation, the control units must be be coded by means of a diagnosis Suitable trailer hitch, e.g. 4N0800491H,J Suitable control unit 4M0907383X We would also be happy to receive an offer for the complete retrofit of a trailer hitch