Audi A4: Laws and Regulations

 Introduction

The purpose of this repair manual is to provide service advisors and technicians with the basic knowledge needed to ensure professional and competent procedures.   Note Only the careful study of this documentation, practical implementation of the information contained, training on A/C syst

 Connections for Quick-Release Coupling on Refrigerant Circuit

General Information Only valves and connections that are resistant to refrigerant R134a and refrigerant oil must be installed. Different connections (outer diameter) for high pressure and low pressure side. Discharge the refrigerant circuit before removing valves or valve inserts. Always scr