I just drove my '09 335i home from the dealer. There was a little exclamation point light that was illuminated underneath the temperature, next to the "D" light. The car has 50 miles on it and I barely know what everything is. I looked at the manual, but couldn't seem to find anything. Thanks for your help!!
I just checked...it wasn't the handbreak. There is a separate light that says "break."

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I just drove the car around the block and the light didn't come on. I'll check again tomorrow, but would love to know why it was on.
duh...make that "brake"