Audi A4: Laws and Regulations

 Expansion Valve

The expansion valve atomizes the streaming refrigerant and controls the flow quantity so that the vapor is gaseous only at the evaporator outlet, depending on the heat transmission.   Note Be sure to use the correct part number when replacing the expansion valve. Refer to the Parts Catalo

 Tire pressure monitoring system

General notes Each tire, including the spare (if provided), should be checked monthly when cold and inflated to the inflation pressure recommended by the vehicle manufacturer on the vehicle placard or tire inflation pressure label. (If your vehicle has tires of a different size than the size indica