So here's what I have found so far -

Check Engine light is currently on.

Prior to starting, reading is between 10.1 and 11.1. After starting, it hovers around 11.5 for a bit, then slowly creeps up to average of about 12.7, ranging from about 11.9 to 13.1.

I shut-off the car and quickly retstarted it, which triggered the ETS-ABS-Brake Wear cycle, and limp mode. When I restarted the car quickly after shuttung it off, reading was back in the low 11s, and then came back up fairly quickly.

I couldn't get it to act up while driving down the road.

Here's what I am wondering, considering this as well as the fact that e300d97 also had the full battery discharge issue and similar symptoms:

1 - What should the pre-start and running readings be? How much should they vary?

2 - Is it possible that something was fried or damaged when the car was jump started (relay, voltage regulator, etc)?

3 - Is it worth replacing the battery at this point? Is there a *better* battery for these cars, considering the apparent sensitivity to voltage fluctuations?

Happened a few times to my wife today, then wouldn't do it for me.

Ugh!

-Reed