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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 Refrigerant Circuit Complaints

Possible Refrigerant Circuit Concerns Test Requirements Electrical Equipment, vacuum system and air duct fault-finding has not revealed any faults. Refer to Guided Fault Finding for the A/C system ("OBD" or "Guided Fault Finding for the A/C system"), → Wiring diagrams, Troubleshooting &

 Vehicles with Restrictor, Receiver/Dryer and A/C Compressor Regulator Valve -N280-, Checking Pressures, Externally Regulated Compressor

General Information   Note Connect the Air Conditioning (A/C) service station. Refer to → Chapter "A/C Service Station, Connecting". Observe the test requirements. Refer to → Chapter "Pressures, Checking". If a malfunction occurs at only one evaporator in vehicles with two

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