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      02-13-2013, 01:58 PM   #6
Tom K.
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Drives: '07 328iT, '13 Boxster
Join Date: Mar 2008
Location: Maryland

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From the '07 online manual:

"Outside temperature warning
When the displayed temperature sinks to
approx. +37oF/+3oC, a signal sounds and a
warning lamp lights up. There is an increased
risk of black ice."

The warning lamp is the snowflake.

Tom
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