"True, and I believe related only to the special case of parking on an incline with the hill holder active. Otherwise, parking on a flat surface without the hill holder active, the parking brake dowsn't play a part in triggering the beeps…"
"Just my .02 but the parking brake isn't related to the beeping; I never set the brake when turning the car off. It's the speed of shutdown that causes the beeps - just put the car in park, turn off the engine and wait a second or two…"
"Now that is a smart smart!
I am embarrassed to report that I have had this warning myself but did not look for help as I should have, as it eventually went away, but I am even more pleased to learn that my smart is smarter than I am. …"