The air conditioner in the passenger compartment sets the temperature below the ambient temperature. When the air conditioner is turned on, the humidity in the cabin also decreases. If you have air conditioning, a dust filter is also always installed.
A cooling unit is integrated into the standard HVAC system and the vehicle interior can also be cooled. The air conditioner works on the principle of a refrigerator: the compressor, driven by the engine through a V-belt, thickens the vaporous, environmentally friendly refrigerant (R 134a).
In this case, the refrigerant is heated and sent to the condenser. There it cools and liquefies. The evaporator valve injects the cooled liquid into the evaporator, which is similar in design to a refrigerator. The refrigerant evaporates in it. As a result of the evaporation process, the air flowing around the outside of the grate or pipe loses heat.
In this way, the air is cooled and the humidity rises as a result of the formation of condensation moisture.
When the engine is running and the fan is on, cool air can be drawn into the vehicle through the various inlets.
The Mercedes-Benz C-Class is available with two cooling options: air conditioning and automatic climate control. The difference between these two options lies in the management and maintenance.
While with air conditioning installed, the temperature is controlled separately for the left and right side of the passenger compartment, with automatic climate control, the temperature is controlled simultaneously for the right and left side of the vehicle interior.
The advantage of automatic climate over air conditioning is that there is an additional switch "AUTO". When activated, the air quantity and its distribution in the passenger compartment are fully automatically controlled. If "AUTO" disabled, the driver himself can determine the amount of air and its distribution, as with conventional heating and ventilation, but of course also for both parts of the vehicle interior together.
Attention! Repair work on the air conditioning unit must only be carried out by a specialized repair shop.