Jeep Wrangler Owner's Manual

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Voice Mail Calling
To learn how to access your voice mail, refer to “Working with Automated Systems”. ...

Extreme Cold Weather (Below –20°F Or –29°C)
To ensure reliable starting at these temperatures, use of an externally-powered electric engine block heater (available from your authorized dealer) is recommended. ...

Window Fogging
Interior fogging on the windshield can be quickly removed by turning the mode selector to Defrost. The Defrost/Floor mode can be used to maintain a clear windshield and provide sufficient heating. ...