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.

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!
  1. Home
  2. Questions
  3. How do I top off AdBlue?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car runs lean, check engine light on

Hello. Thanks for writing in about your 2009 Audi A5 Quattro. If you are having a lean condition, then the fuel pressure needs to be checked. The most common cause of a lean code on this car is either low...

Q: Grinding noise of the engine with P0340 code

Code P0340 is a camshaft sensor fault. The cam sensor is responsible not only for determining cam position, but it also is used by the engine computer for cylinder identification to set up both ignition firing sequence and sequential injection...

Q: How do you activate or deactivate the Auto Lock feature on 2016 Q5?

Settings like this usually will require either the VAG-COM tool and expertise programming the vehicle. I would consult the dealer in order to have this done.

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.