One problem related to turn signal switch has been reported for the 1999 Volkswagen Jetta. The most recently reported issues are listed below.
The blinker on my car is failing. It is in the unit on the steering column. After turning a corner it will not automatically shut off. When driving it will drop down and come on sometimes. It sometimes does not want to come on and I have to push it hard. The vehicle is a 1999. 5 vw Jetta. I have read on the forums also that this is a very common problem and a very expensive fix.