Audi A4: Checking and Filling
Audi A4 (B9) 2016-2025 Owner's Manual / Maintenance and Care / Checking and Filling
- Fuel
- Refueling
- Emissions control system
- Motor compartment
- Engine oil
- Cooling system
- Brake fluid
- Battery
- Safety precautions
- Charging the 12 volt vehicle battery
- Windshield washer system
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Fuel
Types of gasoline
The correct gasoline grade is stated on the inside
of the fuel filler door.
The vehicle is equipped with a catalytic converter
and must only be driven with unleaded gasoline.
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Refueling
Messages
The following messages may appear depending
on the vehicle equipment:
Messages
If the indicator light appears
with a corresponding
message, refuel the vehicle.
Tank system: malfunction!
P
Emissions control
system
General information
WARNING
The temperature of the exhaust system is
high, both when driving and after stopping
the engine.
Never touch the exhaust tail pipes once they
have become hot. This could
SEE MORE:
Hinges, Removing and Installing
Hinges, Removing and Installing, Sedan
Removing
- Remove the rear lid. Refer to
→ Chapter "Rear Lid, Removing and Installing, Sedan".
- Remove the luggage compartment side trim panel. Refer to
→ Body Interior; Rep. Gr.70; Luggage Compartment Trim Panels;
Luggage C
Global functions
Additional function buttons
Fig. 21 Right side of the multifunction steering wheel
Fig. 22 MMI On/Off knob with joystick function
Adjusting the volume
You can adjust the volume of an audio source or a
system message (for example, from the voice
recognition system) when the sound is playing.
To i
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