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!
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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:
Airbag system
General information
WARNING
If you have not fastened your safety belt,
you are in an incorrect seating position, or
you are too close to the airbag system, the
airbag system will not be able to protect
you. This increases the risk of serious or fatal
injuries. Make sure that every vehicle
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Bulkhead
Overview - Bulkhead
1 -
Lock Washer
2 -
Heat Shield
Overview. Refer to
→ Chapter "Overview - Heat Shield".
3 -
Pass-Through
For coolant lines
Can be replaced only with the heat shield
Equipped on some models
4 -
Seal
For the plenum chamber bu
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