Volgens mij moet je een regensensor inbouwen en daarna wat in vcds doen.
Sensor artikelnummer: 5Q0 955 547A
Vcds coding voor Auto's met Climate control only 
Block 09 - 
Closed area - code 31347 
Coding - long coding - 
Byte 6 - bits 0-1 - change 00 to 02 
Byte 6 - bit 3 - enable 
Byte 7 - bits 0-1 - select the value 03 
Byte 7 - bit 5 - enable 
Byte 13 - bit 5 - enable 
We save the encoding, exit the long coding mode. 
Block 09 - 
Closed area - code 31347 
Coding - select the light / rain sensor (RLHS) in the device list - 
Long encoding - 
Byte 0 - 00 
Bytes 1-2 - choose 185E 
We save the encoding, exit the program and reboot the blocks by closing / opening the car. Further: 
Adaptation - channels: 
-Assistance light functions-Assistenzfahrlicht bei Regen - active 
-Assistance light functions-AFL Zeitverzoegerung - 2 000 ms 
-Assistance light functions-Lichtsensorempfindlichkeit - normal 
-Assistance light functions-Assistance_lighting_sensitivity_ajustable - present 
-Comfort illumination-Coming Home Verbaustatus - automatic 
-Comfort illumination-Menuesteuerung Coming Home Werkseinstellung - active 
-Comfort illumination-Menueeinstellung Cominghome - 10 s 
-Comfort illumination-Coming Home Leuchten - Low beam 
-Comfort illumination-Coming-home Einschaltereignis - Driver door 
-Comfort illumination-Helligkeitsschwelle Infrarot-Messung - 72.0 
-Comfort illumination-Leaving-Home Verbausstatus - Enabled 
-Commfort illumination-lho_aktiviert - active 
-Commfort illumination-lho_zeit - 10 s 
-Commfort illumination-Helligkeitsschwelle Forward-Messung - 100 
-Driving light and parking light-Menueeinstellung CHO LHO - Menuesteuerung Zeit aktivieren 
-Windshield wiper-Regensensor aktivieren-activated 
-Rear Window Wiper-Komfortwischen Heck - active
-Rear Window Wiper-Menuesteuerung Komfortwischen HW - active 
** Sensor catalog number: 5Q0 955 547A - 2016MY, 5Q0 955 547B - 2017MY