OK.here it is....it's an automatic climate control system..primitave yet German....it doesn't work worth ****....it (the CCS) turns the fan on and off whenever it (the CCS) determines that's what you need....that's that one....now as far as the stupid headlamp wipers go..they only work under the following conditions......A: Main Windshield Wiper On B: Headlights On
C: Engaging windshield fluid switch ...