I've got a 13 jetta TDI . bought it new. Now has just under 34,000 on it. Love it. Gets between 40-45 mpg depending on driving situation. I wish they had plug and play tuning for them! The only thing I have found as far as plug and play is the mp8
Installed one of these devices on my 13 Jetta TDI. I sure like being able to view my coolant temp now as well as manifold pressure/boost.
Can add an analog 0-5v sensor as well as analog boost and do some other fancy stuff I'm not sure how to do yet.