Audi A4: Engine

 Fluids in the A/C system

Refrigerant in the A/C system The sticker in the motor compartment provides information about the type and amount of refrigerant used in the vehicle's A/C system. The sticker is located in the front section of the motor compartment or at the front or back of the hood. Warning: the A/C system must on

 Reservoir

The reservoir collects the vaporized and gaseous mixture coming from the evaporator to ensure the compressor only receives gaseous refrigerant. Gaseous refrigerant is formed from the vapor. The refrigerant oil flowing in the circuit is not retained in the reservoir as it has an oil drilling. Moi