The air conditioner in the car sets the temperature below the ambient temperature. When the air conditioner is on, the humidity in the car also decreases. If the air conditioner is installed, a dust filter is also always installed.
The standard heating and ventilation system has a cooling unit integrated into it, and the interior of the car can also be cooled. The air conditioner works on the principle of a refrigerator: the compressor, driven by the engine via a V-belt, condenses the vaporous, environmentally friendly refrigerant (R 134a).
The refrigerant is heated and sent to the condenser. There it cools and liquefies. The evaporation 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 grille or pipe loses heat.
In this way, the air is cooled and the humidity increases as a result of the formation of condensation moisture.
When the engine is running and the fan is on, cool air can enter the vehicle through various inlets.
Mercedes-Benz C-class is available with two cooling options: air conditioning and automatic climate control. The differences between these two options are in control and maintenance.
While with the air conditioner installed the temperature is adjusted separately for the left and right parts of the passenger compartment, with automatic climate control the temperature is adjusted simultaneously for the right and left parts of the vehicle's passenger compartment.
The advantage of automatic climate control over air conditioning is that there is an additional "AUTO" switch. If it is activated, the air quantity and its distribution in the passenger compartment are fully automatically regulated. If "AUTO" is switched off, the driver himself can determine the air quantity and its distribution, as with conventional heating and ventilation, but, of course, also for both parts of the passenger compartment together.
Attention! Repair work on the air conditioning unit must be carried out only in a specialized repair shop.