GeneValgene it sounds to me like your EGR valve may be clogging/defective which is a fairly common problem in the '03-05 HCH's. If this is the trouble there are a few options:
- Warranty replacement
- Non-warranty replacement.
- Remove it and clean it out yourself
My own car had a period of jerky driving but mainly in continuous moderate acceleration, mainly pulling a hill which should have been a smooth experience.
This started for me at around 28,000 miles.
I remember once as our heads were as if nodding "yes" and my wife asked me "What's that"?
The 30,000 mile regular maintenance schedule includes a CVT fluid change that had fixed it. I have about 82,000 miles and have not happened again.