ok, picked up the car today. Was told there is no idle control valve in this car, it has valvetronic (or something along those lines), so far didn't notice any improvement, as far as this is concerned (shaking when stopping), actually seems worse.

As to the issue with lurching, was told that this is normal for these cars.

amacman I think you might be right as far as cooling is concerened, but I can't do anything with the car, since it is still under warranty for a short while, then cpo.

Guys thanks for your input, will keep on posting as to the developments.
Any new ideas please let me know.