Enable Trailer Assist on MQB cars

   #1  

hadez16

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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:
   #2  

hadez16

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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  

downtime

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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.
 
   #4  

hadez16

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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.
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?
 
   #5  

downtime

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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?
 
   #6  

DV52

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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.
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
 
   #7  

downtime

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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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