Wasserpest
Veteran Member
Is it alright to top off DEF, or do I have to wait for the low-level message to appear?
(Sorry if this is a dumb question.)
(Sorry if this is a dumb question.)
VCDS can show you the level on a 2015 Golf.I kind of wish there was a way to tell how much is in there.
Thanks again for the helpful replies & discussion.
I just bought the car with <20k miles on it and have no clue if the dealer topped up the DEF, nor how fast it is being used up (post-fix). Don't have a VCDS. But...
Can I "go 20th century" and just stick a (cleanly shaven) wooden stick in there and see if it seems to be full?
Alternatively, I may just buy a gallon of it and chuck it in there and hope that will last until I am back.
Very easy for you and me. I will just top it off with a gallon and be done with it. Thanks for all the help!Is your fill port in the fuel fill area? If so filling the def is a pretty easy affair. I would just buy a cube and put it in the trunk. Show her how to do it and let her do it. If you can put fuel in the car you can fill the def tank as well. Isn't really any harder than that. Kind of like filling with a spare tank when you run out of gas in other cars. The cube has its own built in nozzle and all you have to do is open the cube and put the nozzle on and pour it in. If the warning comes on she has quite some time to do it or go by and let someone else help her do it. Not a big issue.
Let's not oversimplify this.The community here is making a very simple task sound complicated. If you top up the DEF now you will never have to worry about your wife running out. If by some slim chance she does you have 1500 miles to go to top it up I hope that she is never that far from home in here car without you. In reality, it is no more difficult than filling the windshield washer fluid, with the exception of not wanting to spill any. That being said your car has the fill port on the outside and if you do overfill and spill it just washes off with water. The previous Passats had it in the trunk and if you overfilled it stained the inside of the trunk with urea crystals. Filling the DEF tank is easier than changing a tire.
Let's not oversimplify this.
(The '15 Jetta has the fill hole inside the trunk).
Okay, OH, I'm going to continue flogging this dead horse, and...I don't even have a horse in this race!
Have you noticed if the tank internals are better protected from corrosion if continually immersed in AdBlue? I recall speculation early on that running the tank mostly empty vs. mostly full might be a contributing factor in AdBlue pump failures.
For sure, an OCD question, but...your experience is valuable.
The "store brand" at WALMART that comes in the 2.5 gallon container hase a hose that fits perfectly on my 2015 Golf. Just put the hose into the DEF fill port, open the vent on the DEF container and just lift it up until the container is empty.
If your tank will not accept the full 2.5 gallons you are going to have a spill.
If you wait to fill until the warning comes on, you won't have a problem fitting the entire 2.5 gallon container into the tank.If your tank will not accept the full 2.5 gallons you are going to have a spill.