Audi A4 (B9) 2016-2025 Service Manual
Service Manual for fith generation Audi A4 (B9). This service manual is provided by a manufacturer explaining how to use, maintain, troubleshoot, and repair your car. Here is information about 4-Cylinder Direct Injection 2.0L 4V TFSI Engine Disassembly, Inspect and Reassemble, 7-Speed Dual Clutch Transmission (0CJ, 0CK, 0CL) technical data, repair Information. Also important data about Suspension, Wheels, Tires, Wheel Alignment, Steering, Heating, Ventilation & Air Conditioning and etc...
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Battery General Information
To guarantee a long service life, the Battery -A- must be
checked, serviced and maintained as described in this manual.
The Battery -A- supplies the power to start the engine. The
Battery -A- also acts as a power reserve for the entire vehicle
electrical system.
General Information
The support mode provides the vehicle electrical system with
voltage when the Battery -A- is removed or disconnected.
For more information. Refer to the Battery Charger -VAS5903-
Operating Instructions.
The support mode is used for the following situations:
Vehicle electrical