Very happy with my recently bought 2007 Silver Pine Mica Prius business edition (Opal Green for Europe). There is this small button on the Lower left side of the dashboard that is lightning up sometimes. Can't figure out what it is. 
I vote (hope) for James Bond stuff like oil slick or smoke screen. Maybe even passenger ejection seat or anti-aircraft/anti-tailgater missile? Regardless, it's a nice clean install. wow...I liked the look so much that I went to the Toyo EU site to see if they had an owners manual to look at. I found something even better. Off topic, but way way way interesting.. Counterfeit Parts | Toyota Europe
Yes, I have. It kept telling me "I'm sorry, I'm afraid I can't do that" with this weird little voice. Very polite though...
Sorry for the late respond; wind was all wrong, had to walk back after the parachute finally landed in a ditch on the outskirts of town. Will try some other options today. Thanks for your reactions so far, appreciated.
Turns out that it deactivates the beep of the front parking sensors. The sensor system itself stays in function, as the little button lights up when the front of the car comes within a certain distance of objects.
