Hi All,
I use the "brake hold" system all the time - driving in Bangkok, it is a must..!!
For a full rundown on my experience...:
I turn on the feature when I'm in the car and ready to go, or started on my trip (you can be moving when turning on or off the feature.) - just have to have the seatbelt on.
Every time I come to a complete stop, the brake hold "engages", and locks the rear wheels. The rear brake lights stay on.
Brake foot is free to move around, and just step on the gas to start moving again. (the feature is still "on" but not engaged until the next complete stop.)
When stationary with the brake hold engaged, I tried unbuckling my seatbelt without my foot on the brake, and the car's Parking brake is immediately engaged - so there are no runaways..!
You can also turn the feature off, while just driving along, just by pressing the feature button, as you would to turn it on.
Hope this clears up any doubts people still have with this great feature...!!