Most likely not, BUT America has come out with some good cars lately. In MOTOR TREND they ranked the new CTS-V over the M5, thats a pretty big feat. But, I don't know if I will ever talk myself into buying one.
With the unlock button on the remote.
Got an owners manual?
If not:
Owners Manual PDF collection.
Check out "Entering and Exiting.pdf"
Holding down the unlock button only opens them, it does not close them. I do not know of any way to close them all in one touch no.