REVS TOO HIGH WHEN COLD...........

Yes, it is a known issue

https://www.google.com/search?q=vw+jetta+2.0+tfsi+rev+hanging

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make sure transmission fluid is full

fault in plastic pedal sensor
low oil
needs a service
shift solenoid fault

I would consider changing the vehicle speed sensor. When they go bad, they can really throw out a lot of bad data to the computer, resulting in unexpected behavior like you're experiencing. They're only around $20-$25. I hope this helps! :)

Any codes?

1. Transmission fluid level
2. Engine idling rpm
3. Accelerator pedal position (APP) sensor
4. Line pressure test AT-66, "Line Pressure Test"
5. Line pressure solenoid valve
6. Control valve assembly
7. Transmission control cable, if any.
8. Short circuit in wiring harness.

when vw started to use the computer controlled gearbox system a criticism was the shift was very harsh,to counter this they made it rev slightly before changing.so that you know the system, try this out....without touching the gas.....put it in d and let the car accelerate to its max speed,stop,then use 1/3rd of gas (keep your foot still)and let it do the same...stop,then,if safe,put your foot to the floor,hard, notice when the car changes gear(revs/speed)then if you drive,only using the first1/3rd of the gas,the cars change pattern will alter to suit.......wierd it is.....

You need to check the cable the runs from the gas pedal to the engine, it might be rusty and need some drops of penetrating oil at the point it meets with the engine accelerator valve.

This is a very common problem for ford. I have the same thing every day. It is the computer not reading the temp. When it does that just tap the gas pedal.

The grinding sound may be a throw out bearing or the pilot bearing. The sticking throttle problem sounds like a linkage or cable binding up from possibly damage due to the impact from the accident.