2015 Jetta TDI DSG - Hill Hold works only intermittently
 

2015 Jetta TDI DSG Highline

This car has hill-hold assist which I believe is supposed to hold the car on an upward incline for about 3 seconds.

The issue is, it works intermittently. Sometimes it works perfectly, sometimes the car rolls back a little,

The frustrating point in my case is that it never seems to misbehave when trying to replicate the issue with VW service people on board - it occurs only when they’re not there in the car.

Well, actually it did happen a couple of times with them on board, but they refuse to accept that they observed it.

They also tell me that “it only rolled back very slightly, and that’s how it’s supposed to behave”; and “hill-hold only works when you shift from neutral to Drive, and not when coming to a complete stop without shifting to Neutral”.

To their credit, the VW service centre did try speaking with VW India’s senior tech folks at the factory; but the tech folks say that unless there is a fault code there is nothing they can do. And there is no fault code!

I did try to shoot a video of when this happens, but the video only shows a slight roll-back and they’re unwilling to accept that the video shows any rollback.

Any ideas on what else I could do to try and get them to do some trouble-shooting without fault codes?

The car is completely stock, no mods of any kind anywhere other than using a spare fuse to connect a dash cam.

Thank you and cheers

If you have access to VAG-COM\VCDS check the settings.

https://www.myturbodiesel.com/wiki/h...h-vcds-mk6-vw/

Thank you for the prompt response.

Yes, Hill Hold is indeed enable, and has been working properly for four years. It is only in the last one year (the fifth year) that this problem has started to manifest itself. And even then, it is only intermittent. It does work sometimes and it does not work sometimes.

Thank you and cheers