I need some help from the gurus sorting out what could possibly be the problem on my 2001 Jetta TDI with 205k. My car was running well today when I stopped it for about 30 seconds to get my mail. When I tried to restart, all the dash lights turned on, but the engine barely cranked, sounding like it had a low battery. Over an hour, I attempted to restart it multiple times with no luck. A few hours later, a friend gave me a jump, and immediately the engine fired up without any trouble. Since this occurred, my car has been starting fine. Any idea what caused that, and what I need to fix to prevent this problem in the future?