How do the heater and defroster sliders work on a 1971 Mercedes 250c?

In a 1971 Mercedes 250C, the heater and defroster sliders control the flow of heated air from the engine's cooling system into the cabin. The heater slider adjusts the temperature of the air, while the defroster slider directs airflow to the windshield to clear fog or ice. Both sliders operate through a series of cables that open or close the respective air ducts, allowing the driver to customize comfort and visibility. Proper functioning of these sliders is crucial for effective climate control in the vehicle.