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  1. KrisKrk

    KrisKrk A6 C6 4F 2010 LeMans Avant Gold Supporter TDi Audi A6 Audi Avant Owner Group S-line owners group Manual Le Mans Edition

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    Has anyone experienced leak from rear end/boot area in theirs Avant’s?

    Got this today

    [​IMG]

    [​IMG]

    This morning had puddle in that area
    This spot happen within 3 hours

    Could it be leak from fuel tank?
    Certainly doesn’t smell like diesel


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  3. Rob1967

    Rob1967 Member Team V6 TDi Audi A6 Audi Avant Owner Group Manual

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    Don't know if you had any rain but my avant used to leak in through rear lights on tailgate. And also rear washer piping prone to leaking and wetting boot
     
  4. KrisKrk

    KrisKrk A6 C6 4F 2010 LeMans Avant Gold Supporter TDi Audi A6 Audi Avant Owner Group S-line owners group Manual Le Mans Edition

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    It rained Thursday and it would need to accumulate somewhere to let out now.

    This liquid is greasy and slippy.
    It is also bit browny, as in the second picture.

    Will inspect it closer


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  5. niedzial1983

    niedzial1983 Active Member

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    Check if there is no water under spare wheel as well

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  6. KrisKrk

    KrisKrk A6 C6 4F 2010 LeMans Avant Gold Supporter TDi Audi A6 Audi Avant Owner Group S-line owners group Manual Le Mans Edition

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    This is the puddle found this morning

    [​IMG]

    Good 12”+ in diameter and still there since 11am when first seen.
    Should be dry by now but as it’s greasy, it doesn’t evaporate.

    Found some moisture in the spare wheel well and looking at it mould from underneath the boot, it did leaked from one of the well drain plugs.

    I washed the car last week Saturday, before aitp. Could it leaked just now, if there was no rain till Thursday only?

    Any ideas where water could get in there from?


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  7. Seanchadwick2k3

    Seanchadwick2k3 Audi A6 C6 2.0tdi 2011 Sline Special Edition Audi A6 S-line owners group Le Mans Edition

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    I have a similar stain under the rear of mine from the previous owner leaving a bottle of oil with the spare and the lid not being on properly. Maybe leave something underneath tonight to catch it in so you've got a better idea of what it is?
     
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  8. KrisKrk

    KrisKrk A6 C6 4F 2010 LeMans Avant Gold Supporter TDi Audi A6 Audi Avant Owner Group S-line owners group Manual Le Mans Edition

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    Cheers Sean,
    Barely could dig the stuff I keep in there out to check for water ingress. Got a bad back today but had to check it provisionally.

    Thought it will be fuel tank but, as mentioned above earlier, it isn’t diesel nor any oil. I do have a 1litre oil bottle for top up from last service but not much in there left and lid is solid on.
    Have fuel additive with less than 1/5 remaining in it but again, lid is on properly.
    Both bottles been squeezed to check for leaks and they are good.

    Will check tomorrow morning


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  9. niedzial1983

    niedzial1983 Active Member

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    Have you got a sunroof ? Also check if the area around the amp is dry , bottom of the boot lid etc. Common issue on avant is washer fluid leak going to rear wiper

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  10. KrisKrk

    KrisKrk A6 C6 4F 2010 LeMans Avant Gold Supporter TDi Audi A6 Audi Avant Owner Group S-line owners group Manual Le Mans Edition

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    No sunroof on mine.
    In the amp compartment have a lot of junk but will dig it all out to check in there also. Thank you for the tip.
    Washer fluid would dry within the time I went for shopping. Nothing is sloshing around in the tailgate. Boot floor carpet and other boot panels are dry.
    Will investigate further.
    Cheers fellas for input


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  11. Roadrunner146

    Roadrunner146 Active Member Team Moonlight TFSI Owners Group Team V6 Supercharged Audi A6 Audi Avant Owner Group quattro S-line owners group

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    Is it brake fluid.
     
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  13. KrisKrk

    KrisKrk A6 C6 4F 2010 LeMans Avant Gold Supporter TDi Audi A6 Audi Avant Owner Group S-line owners group Manual Le Mans Edition

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    Hmmm
    There was no colour to the liquid on the floor and in the wheel well. Definitely no smell was there either.
    Brakes feel solid.
    Today feeling better (atm) so will check it again when back from work.


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  14. KrisKrk

    KrisKrk A6 C6 4F 2010 LeMans Avant Gold Supporter TDi Audi A6 Audi Avant Owner Group S-line owners group Manual Le Mans Edition

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    Yesterday had time to check it out.

    [​IMG]

    [​IMG]

    Liquid like cooking oil

    [​IMG]

    Turned out to be an engine oil I had a 1 litre bottle of with some remaining in it.
    When I checked it last time, I’ve squeezed the bottle holding the cap so it looked like it was sealed properly. Yesterday I grabbed on hand and it leaked out.
    All gone out from one of the drain plugs in the wheel well.

    Did facepalm do hard, forehead still hurts. Lol

    Thank you all for input.
    Glad it wasn’t anything serious


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