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Defrost Function Test

WARNING: This page is about a different car, the 2000 Mercedes-Benz C230. However, it is still accessible from the selected car via links, so may be relevant.

Adjust selector wheel to White range. Verify EC (economy) button light in A/C push button control module is off. Adjust air distribution knob to vertical (12-o'clock) position. If operation is correct, air will vent from center vents and defroster outlets. A/C compressor should be engaged. If this mode does not operate properly, perform the following tests:

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