The wifely one's 2019 Disco Sport has a heated windshield, which seems to only stay on for a few minutes at a time. The rear glass heater will stay on for ages.

Can this be adjusted with a Gap, maybe in the CCF, or is there some hidden timer adjistment?

 

It takes a ton of power so it will turn off much sooner than the rear. Basically unlike the rear, it is meant to work fast so you can drive off. But it should stay on long enough to melt stuff, about 10 minutes, then cycle off.

 

It doesn't seem to stay on for that long-about 5 minutes. Another source I found in my search said it might be tied to the climate control and might be turned off and on automatically as needed. I find that working the climate controls in her DS can be somewhat annoying especially when the windshield fogs up.