The early to mid 90's VW's broke down like crazy... kind of like the ones earlier than that, except then computers and other complicated parts had been implimented, so those generations of VWs were a pain and very expensive to maintain...
Anyway, I've heard that those problems have been addressed and VWs are actually somewhat reliable now.
So my question is, why a jetta? If it's a commuter car, then your wife just needs something to get from point A to B. If you're sticking with VW, then get the Golf TDI. They get 65mpg. SIXTY-FIVE MILES PER GALLON!!! Also, they still fit 2 people VERY comfortably and 5 people relatively easily.
Plus, she won't look like all those yuppies and teenie boppers in Jettas