What does the AUTO button on a Mercedes-Benz mean?

[KiraLynn]

The AUTO button on a Mercedes-Benz refers to the automatic air conditioning system. Air conditioning layout: Different types of air conditioning systems have varying layouts. Currently, integrated heating and cooling air conditioning systems are widely used in passenger cars. The layout involves assembling components such as the evaporator, heater core, centrifugal blower, and control mechanism together, forming what is known as the air conditioning unit assembly. Air conditioning components: Modern air conditioning systems consist of a refrigeration system, heating system, ventilation and air purification devices, and a control system. Automotive air conditioning generally includes components such as the compressor, electronically controlled clutch, condenser, evaporator, expansion valve, receiver-drier, piping, condenser fan, vacuum solenoid valve, idle speed controller, and control system. Automotive air conditioning is divided into high-pressure and low-pressure lines. The high-pressure side includes the compressor output side, high-pressure lines, condenser, receiver-drier, and liquid lines; the low-pressure side includes the evaporator, accumulator, suction line, compressor input side, and compressor oil sump.