I had a 1998 GLS TDI, and it cured be of Volkswagenitis for over 3 years. It was an electrical nightmare, and the engine grenaded at 120,000km (new one was over $10,000 installed). They are so tight, in the engine compartment, that even minor work is hundreds of dollars more than another body style.
In short, stay away from the dreaded beetle. IMHO