What is #21 on the fuse panel?
Sorry acfree, I couldn't track down your info on the web. I'll bet your local library will have the Chilton's manual for your Jetta and you'll have your answer there. If not a quick call to the parts counter of your local VW dealer will yield your answer. From what I saw of other model years however I am going to bet it's the low beams. Good luck.
Search Volkswagen Jetta Questions
Volkswagen Jetta Experts