How to tell if DEF(ad blue ) tank is full

Discussion in '2012-2015 VW Passat TDI forum' started by domano 68, Apr 12, 2012.

  1. domano 68

    domano 68 Member

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    So when I pick up my Passat and the dealer tells me the DEF tank is full how do I tell?
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  2. chittychittybangbang

    chittychittybangbang Administrator

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    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.
  3. wolfsburg_de

    wolfsburg_de New Member

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    2012 Passat TDI 6MT
    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 %.
  4. domano 68

    domano 68 Member

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    Thanks for posting! This is my first VW so I have no idea what VCDS is. Thanks!
  5. MyAvocation

    MyAvocation Member

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  6. domano 68

    domano 68 Member

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    2012 Passat TDI SE DSG
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    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.
  7. Naphta

    Naphta New Member

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    Jan 19, 2012
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    Car:
    2012 Passat Comfortline auto. DSG
    Ad blue

    I think that there is a light that will come on in the dash when the level is low reminding you to refill.
  8. rico567

    rico567 Member

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    2013 Passat TDI SEL Premium
    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.
  9. TDI_Brad

    TDI_Brad Member

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    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.
  10. domano 68

    domano 68 Member

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    North AL
    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?
  11. FirstTDIinMS

    FirstTDIinMS New Member

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    Apr 20, 2012
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    Car:
    2012 TDI SEL Premium
    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.

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