April 5, 2026: LEMON Manuals is launched! Read the announcement.

General Information: Notes

WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

→ Introduction

→ Air Conditioning System Principles

→ Refrigerant R134a

→ Refrigerant R134a Properties

→ Refrigerant Oil

→ Air Conditioning System, Operation

→ General Work Safety

→ Product Properties

→ Refrigerant, Handling

→ Pressure Vessels, Handling

→ Safety Regulations for Working with Extraction and Charging Systems

→ R134a Safety Precautions

→ Basic Rules for Working on Refrigerant Circuit