Defrost Mode
WARNING: This page is about a different car, the 1997 Mercedes-Benz C280 and 1997 Mercedes-Benz C230. However, it is still accessible from the selected car via links, so may be relevant.
Setting is used for clearing fogged windshield. In heating mode, warm air is supplied to windshield, foot area and dash panel side registers. Additional warm air may be emitted periodically from center dash panel register, depending on interior temperature. In cooling mode, cool air is supplied to windshield, foot area and dash panel center and side registers.