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Thread: Enable Trailer Assist on MQB cars

  1. #1
    Verified VCDS User hadez16's Avatar
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    Enable Trailer Assist on MQB cars

    Hi all,

    the following script is a one-clicker to enable the Trailer Assist on MQB cars just by coding.
    This was already successful coded on a VW Passat B8, VW Tiguan AD or Golf MK7.5

    Requirements are of course a trailer hitch, a Trailer Assist capable rear view camera and of course a PLA 3.0 parking assist PDC unit.

    If you own AreaView, your rear view camera is capable of it.

    Code:
    StartVCDS()
    CheckForUnits("6C,69",1) ;RVC and trailer as a requirement otherwise error
    OpenUnit("6C")
    	TestComponent("Areaview",1) ; it is most likely that one already has the AreaView RVC
    	ChangeCoding("10:3","")
    CloseUnit()
    OpenUnit("10")
    	TestComponent("PLA 3.0",1) ; PLA required
    	LoginToUnit("71679")
    	ChangeCoding("0:3","")
    CloseUnit()
    OpenUnit("5F")
    	ChangeAdpChannel("menu_display_trailer_assistant","not activated")
    	ChangeAdpChannel("menu_display_trailer_assistant_over_threshold_high","not activated")
    	ChangeAdpChannel("Trailer_Assistant_0x36","not activated")
    	ChangeAdpChannel("Trailer_Assistant_msg_bus_0x36","Comfort data bus")
    CloseUnit()
    OpenUnit("17")
    	ChangeCoding("12:5","")
    CloseUnit()
    
    ClearAllDTCs()
    Cheers,
    hadez16
    Last edited by hadez16; 04-14-2019 at 02:48 AM.

  2. #2
    Verified VCDS User hadez16's Avatar
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    The script had flaws. I edited my first post.

    Is "Comfort data bus" the right expression in the english VCDS version? At least that is what I found...

    And yes, the trailer_assistant channels should be deactivated except for the databus channel, otherweise there can be problems with the RVC.
    Feedback would be appreciated

  3. Likes PetrolDave, icardiag, Uwe, downtime liked this post
  4. #3
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    Sorry, old thread but maybe the script should be update. Also ABS has trailer assist related bit. Byte 24 bit 7 ARA trailer assist.

  5. #4
    Verified VCDS User hadez16's Avatar
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    Quote Originally Posted by downtime View Post
    Sorry, old thread but maybe the script should be update. Also ABS has trailer assist related bit. Byte 24 bit 7 ARA trailer assist.
    Hey,

    I did activate Trailer Assist already on many MQB cars but never changed the ABS coding.
    Do you know in what situation this bit has any effect?

  6. #5
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    Good question. Maybe there’s some auto braking feature as well?

    Have you compared ABS coding from a car which has trailer assist from factory?

  7. #6
    Verified VCDS User DV52's Avatar
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    Quote Originally Posted by downtime View Post
    Sorry, old thread but maybe the script should be update. Also ABS has trailer assist related bit. Byte 24 bit 7 ARA trailer assist.
    And, the ABS module also has IDE04774-Vehicle and trailer stabilization. Not sure what this does but my MQB platform A3 had factory fitted trailer function and this channel was factory set to not active
    VW Golf MkVII (MY13) - A3 8V hatch (MY17)

  8. #7
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    I had that as well set to not active and I have a factory tow bar. Trailer stabilization function I think is ESP feature that will help stabilize the car + trailer combo if it starts to get out of control on slippery conditions. I set it to active on my car and have not seen any ill effects at least.

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