OldGuy

I went and splurged on a optima redtop from Costco and when I changed the batteries my one touch windows went away. Does anyone know the secret code for getting my one touch windows back? I Seemed to have misplaced my manuals with all these BMW purchases.

ArcticFox

On my BMW, just put the window all the way up, release button, then push "UP" and hold for about 10 seconds. See if it works after that. AFAIK, that is how you reset them...give it a shot and let me know.

I have not had to do it to the GT3, but I bet it is the same..

LVDell

You just need to lower and raise them again so they can "reset".