If the wires are snapped off in the plug you'll need to fit a new plug ideally or try and get the pins out and you can get repair wires from vw,if not you can always make up a connector and follow the wires back to the loom and add a pair of wires etc,once re-fitted your n75 WILL NOW FUNCTION CORRECTLY unless its faulty also if you have access to vag-com you need to clear the existing fault code also take it for a drive and re-scan hopefully alls good.