I know this topic has been aired before, but I could not find the reversing buzzer on my Greenline, that only has rear sensors.
I bought a workshop manual, be it on a CD. And it showed the location of the buzzer to be in under the left had panel in the luggage area,
and was around the area of the wheel arch. After a struggle getting the panel off, there was no sign of the buzzer. I then gave up the idea
of replacing the buzzer, but on backing into my wife's large flower pot and smashing it, and the ear bashing I got from my beloved, it was time
to find the buzzer. Another look on the internet and there was a photo showing it to be on the rear roof panel under the roof lining, and it was.
Having lost the replacement somewhere in my garage, I just disconnected it thinking the system would work without it, but no. So I bought a second
unit from eBay (made in China) connected it up, and we are back to normal with Bolero display working and the buzzer bleeping. Of course, I had to
buy the wife a new flower pot!