Well the way you know you have one touch window up feature is if there is a second detent when you push up. If you have this the way to initialize it is bring the window all the way down, then bring the window all the way up and dont let go when it gets to the top when it gets to the top push the button harder till you hit the second detent and hold it there for about 5 seconds and that should do it.
1982 300D Turbo (Mom's)
1993 BMW 525I (Dad's)
2001 Vw Golf (Brothers)
2002 Nissan Ser SpecV (Im the Black sheep lol)