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Old 01-16-2003, 06:08 PM
Senior Member
Join Date: Sep 2002
Posts: 2,486
The outside temp guage requires the vehicle speed signal(VSS)to record temp changes. When driving on a cold day, the display might read 25F. If you park the car in a warm garage and check the temp display the next morning it will read the same as it did when you shut the car down. If you then start the car, but don't drive, the temp wont change. When you begin driving, the temp display sees the VSS and registers accordingly. The outside temp display has often been referred to as a "black ice detector" due to it's ability to help drivers foresee dangerous driving conditions. When you think about it, it's no surprise that MB thought of it.
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