A Thule Tow Bar to fit a VW 9N Polo 2002-2009. Bought from Volkswagen. Part Number ZGB 6Q0 092 101. Comes complete with a single elctrics kit and the bolts to fit it to the car. Fitting is a very easy DIY job. The wiring just plugs in.
Fitting instructions available here:- www.thuletowbars.com/upload/manuals/towbars/392070.pdf
(Car photo is to show what model it fits. The car is not included :-)