Hey all, this is kind of weird, never had it happen to me before. I was driving (89 300SEL) and it seemed like my battery died. I was driving down the road, first my front speakers went out, then my back, then no sound, then i checked my windows, they went up ever so slowly, my SRS light and my ABS lights came on, and no power would work, but i managed to drive it home. I turned it off and tried to turn it back on, it wouldn't. I let it sit for 20 minutes, and tried again and it started. I let the car run for a half an hour to juice the battery back up, i locked the doors with another key and left it sit there. I went back to the car after a half an hour, unlocked the doors, when i unlocked the doors the engine stopped again. Now it won't start at all. Do i need a new battery? Help!