Audi A4: Checking and Filling
Audi A4 (B9) 2016-2026 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.
Audi r
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:
Rear Bumper Cover Mount, Removing and Installing
Bumper Cover Mount, Removing and Installing, Upper
Removing
- Remove the rear bumper cover. Refer to
→ Chapter "Bumper Cover, Removing and Installing".
- Remove the bolts -arrows-.
- Remove the upper mount -1-.
Installing
Install in reverse order of removal.
Tightening Speci
Connections for Quick-Release Coupling on Refrigerant Circuit
General Information
Only valves and connections that are resistant to
refrigerant R134a and refrigerant oil must be installed.
Different connections (outer diameter) for high pressure and
low pressure side.
Discharge the refrigerant circuit before removing valves or
valve inserts.
Always scr
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