Drove the car to work today. Drove it fine for lunch. Went to start this afternoon and nothing! No clock, no power locks, no sounds. Is this simply a dead battery? The temperature at lunch was upper 20's, when I went to start it, it was 15.

I know I did not leave the lights on...they turn off automatically.

Thanks.

__________________
ARVY

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