Discussion in '2012-2016 VW Passat TDI forum' started by domano 68, Apr 12, 2012.
So when I pick up my Passat and the dealer tells me the DEF tank is full how do I tell?
There is no dipstick. You just have to add until no more fluid goes in. Also, Adblue is included for 3/36k. There might be a measuring block through VCDS software that can see this through a sensor but there's no gauge or anything like that.
With VCDS, I believe you can find the level (expressed as a percentage) in Engine -> Advanced Measuring Values -> 98-0:Sensor for reducing agent fill level. My Passat with about 3600 miles, mostly around town, shows a fill level of 77.03 %.
Thanks for posting! This is my first VW so I have no idea what VCDS is. Thanks!
Oh, ok. Thanks.
I haven't looked at the DEF tank yet but does it have a long neck, i.e. > 10" or so? If not, I imagine you could put a clean stick in there and see where it comes back. Your own personal dipstick.
I think that there is a light that will come on in the dash when the level is low reminding you to refill.
And in a Mercedes AdBlue car, if you ignore the warning and the AdBlue runs out, you have something like 20 starts, and then your ride goes dead until a refill/reset is done.
I read a post on vortex about a B7 that wouldn't start turns out he was out of adblue. So that is confirmed for us.
I guess one could make their own dipstick and monitor the level. Does this have a long neck going down into the tank or a relatively short neck?
Haven't found anything about how to check the level but it gives you about 1,500 miles warning before it won't start again. My 2012 SEL has 20K on it now and adblue warning came on at about 15,500 miles.
I paid to have my 40k and 50k service done with a package. Adblue was topped off at 40k and I just had my 50k done. Just checked and 39.79% with VCDS
So I used the MB 2.5 Gal with new hose I bought some time ago. Nothing spilled and I kept refreshing the reading with VCDS and got it to 100%. Not sure how accurate it
is, but I have no problem topping off since service is going to be done by me going forward (did 30k too) and Adblue consumption could go up with the "fix" anyway
Your AdBlue tank is 1/3rd full.
I bought the 1/2 gallon VW jug of AdBlue, used it, then cut the safety lock off the bottle, refill it with Walmart DEF and refill the tank when needed. It also works on my Audi Q5 TDI. And it fits the opening where no spillage occurs when the tank is full.
2012-2014 NAR Passat(A32) TDI/CKRA – AdBlue Level Reset Procedure
At least in my case, you can tell the DEF tank is full by noticing DEF fluid spilled around the tank by a sloppy VW mechanic. You can use an AdBlue Audi/VW DEF fluid bottle to fill the tank. If you don't have one, they run about $15 from an Audi/VW dealer. It's a bottle that holds 1/2 gallon of fluid. It threads onto the tank without spilling... then you push it down to release the valve... it flows in. Some people use it with a hole cut in the bottom to act as a funnel/measure to dispense DEF in half gallons at a time. I've kept an empty bottle in my trunk just in case the fluid indicator came on... to add a few gallons until the next service... where the mechanic spills DEF fluid all over again. :-( It's sized just enough to fit above your spare tire, there's plenty of room. It's sort of like the spare tire... you hope you'll never need it, but it good to have it along.
Having had our Passat for 3 1/2 years at at around 53K miles, it's pretty easy to estimate that a standard jug of DEF *(2.5 gal US) available in finer stores everywhere (I get mine cheapest at Rural King for $6.99) will refill the tank at the same time I do the engine oil & filter change at 10K. (The car's tank holds around 5 gal, so no danger of running out using this system.) I found the Mercedes fill hose & jug on sale and bought that, just funnel the 2.5 gal. of def into the 10L Mercedes jug, hook up the hose (which is vented), and let it flow in. No mess, no fuss. As has been noted, it's impossible to run out and drive the car, it will warn you starting at 1200 miles, then count down, and if it gets to zero and you stop the car, you won't get a restart. (Don't do this!)
*For those new to this, the term "AdBlue" is a proprietary term of one of the manufacturers, M-B, I believe. The generic term is DEF (Diesel Exhaust Fluid), and DEF is DEF, no matter where you buy it, it's just urea, think of it as a supersaturated solution of pee.
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