Originally Posted by BetaDnB
I think you're making too much out of nothing. This car makes all kinds of noises at different times. Pay attention when you put your key in the ignition after it hasn't been running for a while and you'll hear the fuel pump click on. Lots of electronics. Lots of servos.
You're right - this doesn't seem to be worrisome in the short term, but if it's abnormal for this mechanical cycling to continue over several minutes I'd like to eventually get it resolved. I'll continue to monitor and ask the dealer about it when taking the car in for other service. I just used an OBD scan tool and there are indeed no DTCs, so at least the car's computer system doesn't think anything is wrong.
Thanks again to everyone, and thanks to Crystal for the escalation offer - I may take you up on that in the future. I will post again to this thread when there is more information.