Thanks for your replies. It was the battery. Gave it a boost and it started promptly. Have not had a problem since. I stated that the lights turn off automatically (DRL's). However, I totally forgot that I had used the fog lights when I took the car out during lunch. It started snowing heavily. I was in such a rush to get back in the office that I left the fogs on. Took 2 hrs. to drain the battery. Came back from lunch at 1:30, the clock died at 3:30.

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ARVY

1999 E430
1999 C230 Kompressor
1992 300E (write-off)
1984 190D 2.2 (sold)