Audi A4 Owners & Service Manuals

Audi A4: Electrical System

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 Communication

 Infotainment System

 Overview - Infotainment System

Overview - Infotainment System, MMI Radio Plus, 18E Information Electronics Control Module 1 -J794- with integrated CD player/SD card reader in the glove compartment Multimedia System Control Head

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 Coolant System/Coolant

Connection Diagram - Coolant Hoses Connection Diagram - Coolant Hoses, Versions without Parking Heater   Note Blue = large coolant circuit. Red = small coolant circuit. Brown = heating circuit. Green = coolant circuit for the transmission. The arrows show the coolant flow direction. 1&

 A/C Pressure Switch -F129-

  Note Switch pressures, removing and installing switches as well as switch arrangement and version. Refer to vehicle specific refrigerant circuit → Heating, Ventilation and Air Conditioning; Rep. Gr.87; System Overview - Refrigerant Circuit (vehicle-specific repair manua

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