Mode change hill-associated stall
Driving home Friday in Stealth mode I exhausted my battery while driving up a long approximately 6 degree sloped hill at 35 MPH.
Previously (driving on level ground) my car (v 6.13) has automatically switched to Sport mode when the battery is exhausted, but in this instance, my car abruptly stalled - blocking the evening commute. (My apologies Austin and to the guy who had to panic stop behind me.)
Attempts to restart in Stealth mode after powering down and waiting two minute intervals failed twice. I was able to clear the roadway by putting the car in neutral and backing onto the shoulder.
After more than another five minutes completely powered down, I was able to restart the car in Sport mode and proceed home uneventfully with the check engine light on.
After recharging the next morning everything operated normally. The check engine light is off.
As the stall is very abrupt, I would recommend anyone in hilly terrain to manually switch to Sport mode when battery reserves are low.