[emilijanus]

I'm certain I've tried this before for up to a minute with zero results. How long does it need to be held down? What readiness state is your car in while you're doing this?

Haven't done it myself yet (did not needed it so far) but here is the answer posted after me asking about the source and details from the person that has written about this :
*
I have never seen it published anywhere but one morning my car became a paperweight in my garage. Would not "go". Lights all came on, radio, the climate control, etc. was all working just fine. Called VW support and they wanted to tow it to the dealership. I called my sales person at the dealership and explained the situation when he told me about this "hack". I have used it twice - once again just this past weekend and it worked like a charm.
So, although I haven't seen it anywhere published, the recommendation did come from my VW dealership.
*