as far as getting home, a diesel will run w/out any battery, you won't be able to tell how fast your going etc, but it will keep on running. YOu couldget the battery charged overnight, start the car up and put down the windows, and drive it home in the daylight. Go easy on turn signels etc unless you absolutely have to. The batteries in these diesels are pretty big so as long as the a/c radio etc(basically no unnesecary electrical current draw) is on it should make the 100 mile trip.
96 integra SE....sold
99 a4 quattro....sold
2004 highlander limited....current.