Audi A4 Owners & Service Manuals

Audi A4: Wiring

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 Vehicle Diagnosis, Testing and Information Systems

  WARNING During road tests using a vehicle diagnostic and information system, there is the hazard of extreme to lethal injuries! If vehicle diagnostic and information system is deposited

 Wiring Harness and Connector Repairs

Vehicle Electrical System, General Repair Information   Caution When disconnecting and connecting battery, the procedure must be followed as described in the Repair Manual.   WARNING S

 Wiring Harness Repair Set

Wiring Harness Repair Set -VAS1978- The Wiring Harness Repair Set -VAS1978- makes optimal repair quality possible in the realm of vehicle electronics. Using the tools, repairs affecting harness conn

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 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

 Tachometer

The tachometer (1) displays the engine speed in revolutions per minute (RPM). The beginning of the red zone in the tachometer indicates the maximum permissible engine speed for all gears once the engine has been broken in. Before reaching the red zone, you should shift into the next higher gear, sel

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