We ordered my wife's A3 with the "convenience package," (not the lazy-bastard package) which will automatically engage the wipers AND the headlights when they are left in auto positions. It's kind-a neat-o to have the car figure out "Gee it's raining. I better clear that windshield!" And as Tone said, it's better at it than any adjustable-interval wiper setting, and FAR better at it than the VX's one intermittent-interval setting. Same with the lights - if it's dark out, they turn themselves on. The Audi system is GOOD.
Why did it take over a hundred years of automotive engineering to come up with that?