Hi again
Nothing to do with the parking sensors as that button is on the top line with the car graphic.
Also, I don't think it's the air-con temp. window as the set level stays on permanent and there has never been anything displayed in this window. I'd you look again at the photo, the "sensor" is to the middle right of the photo, same line as the air recirculating button but at the end of that row. Sorry to be so convulated!
1.5 Tsi S-El in white silver.