Skip the auto shop - Our mechanics make house calls

Q: How do I top off AdBlue?

asked by on

I want to add some adblue to topoff the tank. what are the specific steps in doing it?

My car has 8000 miles.
My car has an automatic transmission.

A: The Audi Q5 has an AdBlue filler cap locate...

The Audi Q5 has an AdBlue filler cap located next to the fuel filler cap on the side of the car. Some Audis are supplied with a hexagonal AdBlue filler cap, which requires the wheel nut wrench from the boot. Others are supplied with a filler cap that can be removed by hand, in the same manner as the fuel filler cap.

The capacity of the AdBlue tank on an Audi Q5 is 23L, which gives an estimated range of around 9000 Miles, dependent on driving style. When refilling the Q5, the minimum amount is 5.7 liters, otherwise the AdBlue level meter will not acknowledge the top up. Many of the AdBlue containers come with a wide variety of spouts and pouring aids – these are hugely beneficial, making it much easier to fill your tank.

First - it’s incredibly important to use clean or new equipment. For this reason we strongly suggest not using something that has ever come into contact with engine oil, coolant, fuel or lubricant, such as a funnel or spout. Typically, the best attachment are the locking spouts – These are provided with most 2 and 4 liter containers, and screw on to the AdBlue filler cap, and must be “pushed” down to unlock the valve and allow the liquid to flow. These have the benefit of locking out all exterior sources of contamination such as dust or water, in addition to removing the risk of spillage.

After the tank is full (be careful not to overfill and spill) you can reseal the tank. There is a sensor in AdBlue tanks, you don’t need to “reset” anything – it will automatically read the tank as full. Remember that if you fill with a small amount (less than 4 liters), it may not register as a reset and you will still receive low warnings.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: while driving a I heard a loud pop that sounded like it came through the speakers, the electrical then went out

Hello there, many faults will cause your 2014 Ford F-150 to have a pop and the electrical system failing. You did not state whether the electrical issue is just with the accessories or with the entire vehicle. If the problem...

Q: Fuel rail sensor faulty or fuel pressure too high

Hello there, a check engine light for too high of fuel pressure is unusual with your 2009 Audi Q5. There are one 2 possible faults going on. Either the fuel pressure is too high, or the fuel pressure sensor is...

Q: Rumbling noise coming from left front side - 2008 Mercedes-Benz R320

Hi there. It would seem to be the right front wheel bearing that is making the noise. The vibration could be from the drive shaft center support bearing being worn out. To check if the bearing is worn, push up...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.