Originally Posted by Dackelone
1er's only have a green LED button on the right stalk. Press the button and the wipers work on AUTO.
IF you turn the wiper stalk up one notch they work manually, but they will swipe faster IF the rain sensor detects heavy rain fall.
Not sure if you are implying you can't control the sensitivity of the auto sensing wipers. You can.
I have actually found that the auto wipers work quite well when compared to my other vehicles that had this option. If wiping too frequently, I turn the sensitivity down. If not frequent enough, I turn it up.
This said, the faster you are traveling, it seems the less control you have and the system does what it thinks best.