Here is the latest.
Temp Gauge (fixed) : They first conducted a "wiggle" test on the wiring harness and confirmed wiring and connections were ok. Then they replaced the temperature sensor, seal, and coolant. Everything is working fine.
Fuel Gauge (NOT fixed): Upon diagnosis with VW QTM, found that the fuel gauge sending unit was not reading correctly. VTA DP-702540 (i don't know what this means, but maybe you do). They replaced fuel gauge sending unit.They filled the tank with diesel and said the problem was resolved. At the time of pick-up, I fired up the car...and what do you know....it wasn't on full. Immediatley went back in and got the service manager. Showed him the vehicle, and the apologies began. They offered to keep the vehicle, but I told them I'd bring it back after Thanksgiving (I missed driving it.... the JSW DSG is peppy and fun, but its not for me). They said, that their next step is going to be to swap out the instrument cluster and have the VW "field engineer" assess the outcome. They asked that I come back with all my keys. I will give you fellas an update in a couple of weeks. In the meantime, I will drive the hell out it.