Often, the cause of the VW's Jetta from a straight line of motion lies in a defect in the power steering. More specific is the incorrect operation of the power-amplifier control unit. For example, one of the sensors could escape: position of steering or wheel angle.
You can contact the dealer with this question and fix it. Practice shows that in the first instance, the dealer is trying to convince him that the problem with the water in the wrong unit of wheels is failing, and refuses to diagnose the steering.
